A. Popescu, P. Pudlák, D. Roth, P. Rudnicki, S. Schulz et al., We are also grateful to the anonymous reviewers for their many suggestions and comments

. Blanchette, Sledgehammer research was supported by the Deutsche Forschungsgemeinschaft projects Quis Custodiet (grants NI 491/11-1 and NI 491/11-2) and Hardening the Hammer (grant NI 491/14-1) Kaliszyk is supported by the Austrian Science Fund (FWF) grant P26201. Sledgehammer was originally supported by the UK's Engineering and Physical Sciences Research Council

W. Ahrendt, B. Beckert, R. Hähnle, W. Menzel, W. Reif et al., Integrating Automated and Interactive Theorem Proving, Automated Deduction?A Basis for Applications, volume II: Systems and Implementation Techniques, pp.97-116, 1998.
DOI : 10.1007/978-94-017-0435-9_4

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.125.4447

J. Alama, T. Heskes, D. Kühlwein, E. Tsivtsivadze, and J. Urban, Premise Selection for Mathematics by Corpus Analysis and Kernel Methods, Journal of Automated Reasoning, vol.50, issue.1???2, pp.191-213, 2014.
DOI : 10.1007/s10817-013-9286-5

J. Alama, D. Kühlwein, and J. Urban, Automated and Human Proofs in General Mathematics: An Initial Comparison, Bjørner and Voronkov, pp.37-45
DOI : 10.1007/978-3-642-28717-6_6

J. Alama, L. Mamane, and J. Urban, Dependencies in Formal Mathematics: Applications and Extraction for Coq and Mizar, Intelligent Computer Mathematics LNCS, vol.7362, pp.1-16, 2012.
DOI : 10.1007/978-3-642-31374-5_1

M. Armand, G. Faure, B. Grégoire, C. Keller, L. Théry et al., A Modular Integration of SAT/SMT Solvers to Coq through Proof Witnesses, Jouannaud and Shao [74], pp.135-150
DOI : 10.1145/1217856.1217859

URL : https://hal.archives-ouvertes.fr/hal-00639130

S. Autexier and C. Benzmüller, Armin Fiedler, Helmut Horacek, and Quoc Bao Vo. Assertion-level proof representation with under-specification

G. Bancerek, The mutilated chessboard problem?checked by Mizar, pp.43-46

D. Barsotti, L. P. Nieto, and A. Tiu, Verification of clock synchronization algorithms: experiments on a combination of deductive tools, Formal Aspects of Computing, vol.144, issue.2, pp.321-341, 2007.
DOI : 10.1007/s00165-007-0027-6

URL : https://hal.archives-ouvertes.fr/inria-00097383

M. Beeson, Mathematical Induction in Otter-Lambda, Journal of Automated Reasoning, vol.5, issue.2, pp.311-344, 2006.
DOI : 10.1007/s10817-006-9036-z

M. Beeson and L. Wos, OTTER Proofs in Tarskian Geometry, Demri et al. [53], pp.495-510
DOI : 10.1007/978-3-319-08587-6_38

G. F. Johan and . Belinfante, On computer-assisted proofs in ordinal number theory, J. Autom. Reason, vol.22, issue.2, pp.341-378, 1999.

C. Benzmüller, L. C. Paulson, F. Theiss, and A. Fietzke, LEO-II?A cooperative automatic theorem prover for classical higherorder logic (system description), Armando et al. [7], pp.162-170

M. Bezem, D. Hendriks, and H. De-nivelle, Automatic proof construction in type theory using resolution, J. Autom. Reason, vol.29, pp.3-4253, 2002.

C. Jasmin and . Blanchette, Redirecting proofs by contradiction, pp.11-26

J. Christian-blanchette, S. Böhme, M. Fleury, S. J. Smolka, and A. Steckermeier, Semi-intelligible Isar proofs from machinegenerated proofs

J. Christian-blanchette, S. Böhme, A. Popescu, and N. Smallbone, Encoding monomorphic and polymorphic types, Tools and Algorithms for the Construction and Analysis of Systems, pp.493-507, 2013.

J. Christian-blanchette and A. Krauss, Monotonicity Inference for Higher-Order Formulas, Journal of Automated Reasoning, vol.178, issue.1, pp.369-398, 2011.
DOI : 10.1007/s10817-011-9234-1

J. Christian-blanchette, A. Popescu, D. Wand, and C. Weidenbach, More SPASS with Isabelle?Superposition with hard sorts and configurable simplification, Interactive Theorem Proving, pp.345-360, 2012.

M. David, A. Y. Blei, M. I. Ng, and . Jordan, Latent Dirichlet allocation, J. Mach. Learn. Res, vol.3, pp.993-1022, 2003.

S. Böhme, C. J. Anthony, T. Fox, T. Sewell, and . Weber, Reconstruction of Z3???s Bit-Vector Proofs in HOL4 and Isabelle/HOL, Jouannaud and Shao [74], pp.183-198
DOI : 10.1016/j.jal.2007.07.003

S. Böhme and T. Nipkow, Sledgehammer: Judgement Day, Giesl and Hähnle, pp.107-121
DOI : 10.1007/978-3-642-14203-1_9

S. Böhme and T. Weber, Fast LCF-Style Proof Reconstruction for Z3, Interactive Theorem Proving, pp.179-194, 2010.
DOI : 10.1007/978-3-642-14052-5_14

S. Boutin, Using reflection to build efficient and certified decision procedures, Theoretical Aspects of Computer Software (TACS '97), volume 1281 of LNCS, pp.515-529
DOI : 10.1007/BFb0014565

J. P. Bridge, S. B. Holden, and L. C. Paulson, Machine Learning for First-Order Theorem Proving, Journal of Automated Reasoning, vol.32, issue.12, pp.141-172, 2014.
DOI : 10.1007/s10817-014-9301-5

C. E. Brown, Satallax: An Automatic Higher-Order Prover, Gramlich et al. [65], pp.111-117
DOI : 10.1007/978-3-642-31365-3_11

A. Paul and . Cairns, Informalising formal mathematics: Searching the Mizar library with latent semantics, Asperti et al. [8], pp.58-72

A. Carlson, C. Cumby, J. Rosen, and D. Roth, The SNoW learning architecture, 1999.

K. Chaudhuri, D. Doligez, L. Lamport, and S. Merz, A TLA + proof system, LPAR 2008 Workshops CEUR Workshop Proceedings. CEUR-WS.org, 2008.
URL : https://hal.archives-ouvertes.fr/inria-00338299

W. Chu and S. Park, Personalized recommendation on dynamic content using predictive bilinear models, Proceedings of the 18th international conference on World wide web, WWW '09, pp.691-700, 2009.
DOI : 10.1145/1526709.1526802

K. Claessen, A. Lillieström, and N. Smallbone, Sort It Out with Monotonicity, Bjørner and Sofronie-Stokkermans [18], pp.207-221
DOI : 10.1007/BF00243005

K. Claessen and N. Sörensson, New techniques that improve MACEstyle finite model finding, Model Computation?Principles, 2003.

F. Colas and P. Brazdil, Comparison of SVM and Some Older Classification Algorithms in Text Classification Tasks, Artificial Intelligence in Theory and Practice IFIP International Federation for Information Processing, pp.169-178, 2006.
DOI : 10.1007/978-0-387-34747-9_18

M. Cramer, B. Fisseni, P. Koepke, D. Kühlwein, B. Schröder et al., The Naproche Project Controlled Natural Language Proof Checking of Mathematical Texts, Controlled Natural Language, pp.170-186, 2009.
DOI : 10.1007/978-3-642-14418-9_11

M. Cramer, P. Koepke, D. Kühlwein, and B. Schröder, Premise Selection in the Naproche System, Giesl and Hähnle [63], pp.434-440
DOI : 10.1007/978-3-642-14203-1_37

L. Cruz-filipe, H. Geuvers, and F. Wiedijk, C-CoRN, the Constructive Coq Repository at Nijmegen, Asperti et al. [8], pp.88-103
DOI : 10.1007/3-540-45620-1_12

B. I. Dahn, Robbins Algebras Are Boolean: A Revision of McCune's Computer-Generated Solution of Robbins Problem, Journal of Algebra, vol.208, issue.2, pp.526-532, 1998.
DOI : 10.1006/jabr.1998.7467

B. I. Dahn, J. Gehne, . Th, A. Honigmann, and . Wolf, Integration of automated and interactive theorem proving in ILP, Conference on Automated Deduction (CADE-14), volume 1249 of LNCS, pp.57-60, 1997.

I. Dahn, Interpretation of a Mizar-like logic in first-order logic Automated Deduction in Classical and Non-Classical Logics, LNCS, vol.1761, pp.137-151, 2000.

S. Dasgupta, Experiments with random projection, Uncertainty in Artificial Intelligence (UAI '00), pp.143-151, 2000.

M. Davis, Obvious logical inferences, International Joint Conference on Artificial Intelligence (IJCAI '81), pp.530-531, 1981.

C. Scott, S. T. Deerwester, T. K. Dumais, G. W. Landauer, R. A. Furnas et al., Indexing by latent semantic analysis, J

J. Denzinger, M. Fuchs, C. Goller, and S. Schulz, Learning from previous proof experience, 1999.

A. Sahibsingh and . Dudani, The distance-weighted k-nearest-neighbor rule, IEEE Trans. Syst. Man Cybern., SMC, vol.6, issue.4, pp.325-327, 1976.

L. Erkök and J. Matthews, Using Yices as an automated solver in Isabelle/HOL, Automated Formal Methods (AFM '08), pp.3-13, 2008.

J. Filliâtre and A. Paskevich, Why3 ??? Where Programs Meet Provers, European Symposium on Programming, pp.125-128, 2013.
DOI : 10.1007/978-3-642-37036-6_8

P. Fontaine, J. Marion, S. Merz, L. P. Nieto, and A. Tiu, Expressiveness + Automation + Soundness: Towards Combining SMT Solvers and Interactive Proof Assistants, Tools and Algorithms for the Construction and Analysis of Systems, pp.167-181, 2006.
DOI : 10.1007/3-540-45620-1_26

URL : https://hal.archives-ouvertes.fr/inria-00001088

S. Foster and G. Struth, Integrating an Automated Theorem Prover into Agda, NASA Formal Methods, pp.116-130, 2011.
DOI : 10.1007/978-3-540-70594-9_15

S. Foster and G. Struth, Regular algebras Archive of Formal Proofs, 2014.

T. Gauthier and C. Kaliszyk, Matching Concepts across HOL Libraries, Conference on Intelligent Computer Mathematics, pp.267-281, 2014.
DOI : 10.1007/978-3-319-08434-3_20

URL : http://arxiv.org/abs/1405.3906

T. Gauthier and C. Kaliszyk, Premise Selection and External Provers for HOL4, Proceedings of the 2015 Conference on Certified Programs and Proofs, CPP '15, pp.49-57, 2015.
DOI : 10.1145/2676724.2693173

G. Gonthier, A. Asperti, J. Avigad, Y. Bertot, C. Cohen et al., A Machine-Checked Proof of the Odd Order Theorem, Blazy et al. [26], pp.163-179
DOI : 10.1007/978-3-642-39634-2_14

URL : https://hal.archives-ouvertes.fr/hal-00816699

C. Thomas and . Hales, Developments in formal proofs. CoRR, abs/1408, pp.2013-2014, 1086.

J. Harrison, Optimizing proof search in model elimination, Conference on Automated Deduction (CADE-13), pp.313-327, 1996.
DOI : 10.1007/3-540-61511-3_97

K. Hoder and A. Voronkov, Sine Qua Non for Large Theory Reasoning, Bjørner and Sofronie-Stokkermans [18], pp.299-314
DOI : 10.1007/978-3-642-15582-6_30

X. Huang, Translating machine-generated resolution proofs into NDproofs at the assertion level, Pacific Rim International Conference on Artificial Intelligence (PRICAI '96), pp.399-410, 1996.

J. Hurd, Integrating Gandalf and HOL, Theorem Proving in Higher Order Logics (TPHOLs '99), volume 1690 of LNCS, pp.311-321, 1999.
DOI : 10.1007/3-540-48256-3_21

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.14.7221

J. Hurd, First-order proof tactics in higher-order logic theorem provers, Design and Application of Strategies/Tactics in Higher Order Logics (STRATA 2003), number NASA/CP-2003-212448 in NASA Technical Reports, pp.56-68, 2003.

K. Spärck and J. , A STATISTICAL INTERPRETATION OF TERM SPECIFICITY AND ITS APPLICATION IN RETRIEVAL, Journal of Documentation, vol.28, issue.1, pp.11-21, 1972.
DOI : 10.1108/eb026526

S. Joosten, C. Kaliszyk, and J. Urban, Initial Experiments with TPTP-style Automated Theorem Provers on ACL2 Problems, ACL2 Theorem Prover and its Applications of Electronic Proceedings in Theoretical Computer Science, pp.77-85, 2014.
DOI : 10.4204/EPTCS.152.6

C. Kaliszyk, L. Mamane, and J. Urban, Machine learning of Coq proof guidance: First experiments, Symbolic Computation in Software Science, pp.27-34, 2014.

C. Kaliszyk, S. Schulz, J. Urban, and J. Vysko?il, System Description: E.T. 0.1, Conference on Automated Deduction, 2015.
DOI : 10.1007/978-3-319-21401-6_27

C. Kaliszyk and J. Urban, MizAR 40 for Mizar 40, Journal of Automated Reasoning, vol.50, issue.1-2, 2013.
DOI : 10.1007/s10817-015-9330-8

C. Kaliszyk and J. Urban, PRocH: Proof Reconstruction for HOL Light, Bonacina [31], pp.267-274
DOI : 10.1007/978-3-642-38574-2_18

C. Kaliszyk and J. Urban, Stronger automation for Flyspeck by feature weighting and strategy evolution, pp.87-95

C. Kaliszyk and J. Urban, Learning-Assisted Automated Reasoning with Flyspeck, Journal of Automated Reasoning, vol.50, issue.1???2, pp.173-213, 2014.
DOI : 10.1007/s10817-014-9303-3

C. Kaliszyk and J. Urban, HOL(y)Hammer: Online ATP Service for HOL Light, Mathematics in Computer Science, vol.50, issue.1, pp.5-22, 2015.
DOI : 10.1007/s11786-014-0182-0

C. Kaliszyk and J. Urban, Learning-assisted theorem proving with millions of lemmas, Journal of Symbolic Computation, vol.69, pp.109-128, 2015.
DOI : 10.1016/j.jsc.2014.09.032

C. Kaliszyk, J. Urban, and J. Vysko?il, Machine Learner for Automated Reasoning 0.4 and 0.5. CoRR, abs, 1402.

D. Kühlwein, J. C. Blanchette, C. Kaliszyk, and J. Urban, MaSh: Machine Learning for Sledgehammer, pp.35-50
DOI : 10.1007/978-3-642-39634-2_6

D. Kühlwein, S. Schulz, and J. Urban, E-MaLeS 1.1, Bonacina [31], pp.407-413
DOI : 10.1007/978-3-642-38574-2_28

D. Kühlwein, E. Twan-van-laarhoven, J. Tsivtsivadze, T. Urban, and . Heskes, Overview and Evaluation of Premise Selection Techniques for Large Theory Mathematics, Gramlich et al. [65], pp.378-392
DOI : 10.1007/978-3-642-31365-3_30

R. Kumar, T. Kropf, and K. Schneider, Integrating a firstorder automatic prover in the HOL environment, Myla Archer

V. Alexander, K. Lyaletski, and . Verchinine, Evidence algorithm and system for automated deduction: A retrospective view, pp.411-426

P. Manolios and S. K. Srinivasan, Verification of executable pipelined machines with bit-level interfaces, ICCAD-2005. IEEE/ACM International Conference on Computer-Aided Design, 2005., pp.855-862, 2005.
DOI : 10.1109/ICCAD.2005.1560182

J. Mccarthy, The mutilated checkerboard in set theory, pp.25-26

W. Mccune, Solution of the Robbins problem, Journal of Automated Reasoning, vol.19, issue.3, pp.263-276, 1997.
DOI : 10.1023/A:1005843212881

W. Mccune, Mace4 Reference Manual and Guide, 2003.
DOI : 10.2172/822574

W. Mccune and O. S. Matlin, Ivy: A Preprocessor and Proof Checker for First-Order Logic, Computer-Aided Reasoning: ACL2 Case Studies, number 4 in Advances in Formal Methods, pp.265-282, 2000.
DOI : 10.1007/978-1-4757-3188-0_16

S. Mclaughlin, C. Barrett, and Y. Ge, Cooperating Theorem Provers: A Case Study Combining HOL-Light and CVC Lite, Electronic Notes in Theoretical Computer Science, vol.144, issue.2, pp.43-51, 2006.
DOI : 10.1016/j.entcs.2005.12.005

N. Megill, Metamath, 1997.
DOI : 10.1007/11542384_13

A. Meier, System Description: Tramp: Transformation of Machine-Found Proofs into Natural Deduction Proofs at the Assertion Level, Conference on Automated Deduction (CADE-17), volume 1831 of LNCS, pp.460-464, 2000.
DOI : 10.1007/10721959_37

J. Meng and L. C. Paulson, Translating Higher-Order Clauses to First-Order Clauses, Journal of Automated Reasoning, vol.9, issue.2, pp.35-60, 2008.
DOI : 10.1007/s10817-007-9085-y

J. Meng and L. C. Paulson, Lightweight relevance filtering for machine-generated resolution problems, Journal of Applied Logic, vol.7, issue.1, pp.41-57, 2009.
DOI : 10.1016/j.jal.2007.07.004

S. Merz and H. Vanzetto, Automatic Verification of TLA???+??? Proof Obligations with SMT Solvers, Bjørner and Voronkov [19], pp.289-303
DOI : 10.1007/978-3-642-28717-6_23

URL : https://hal.archives-ouvertes.fr/hal-00760570

T. Mikolov, K. Chen, G. Corrado, and J. Dean, Efficient estimation of word representations in vector space, 1301.

D. Miller and A. P. Felty, An integration of resolution and natural deduction theorem proving, National Conference on Artificial Intelligence (AAAI-86), volume I. Science, pp.198-202, 1986.

J. Otten and W. Bibel, leanCoP: lean connection-based theorem proving, Journal of Symbolic Computation, vol.36, issue.1-2, pp.139-161, 2003.
DOI : 10.1016/S0747-7171(03)00037-3

C. Lawrence and . Paulson, A generic tableau prover and its integration with Isabelle, J. Univers. Comput. Sci, vol.5, issue.3, pp.73-87, 1999.

C. Lawrence and . Paulson, A simple formalization and proof for the mutilated chess board, Log. J. IGPL, vol.9, issue.3, pp.499-509, 2001.

C. Lawrence, J. C. Paulson, and . Blanchette, Three years of experience with Sledgehammer, a practical link between automatic and interactive theorem provers, International Workshop on the Implementation of Logics, pp.1-11, 2010.

C. Lawrence, K. Paulson, and . Susanto, Source-level proof reconstruction for interactive theorem proving, Theorem Proving in Higher Order Logics, pp.232-245, 2007.

A. Pease and G. Sutcliffe, First order reasoning on a large ontology, pp.61-70

F. Pfenning, Analytic and non-analytic proofs, Conference on Automated Deduction, pp.394-413, 1984.
DOI : 10.1007/978-0-387-34768-4_23

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.150.3237

J. D. Phillips and D. Stanovský, Automated theorem proving in quasigroup and loop theory, AI Commun, vol.23, issue.2-3, pp.267-283, 2010.

K. P?k, The methods of improving and reorganizing natural deduction proofs, Mathematical User Interfaces (MathUI10), 2010.

K. P?k, Improving legibility of natural deduction proofs is not trivial, Logical Methods in Computer Science, vol.10, issue.3, p.2014
DOI : 10.2168/LMCS-10(3:23)2014

R. Polikar, Ensemble based systems in decision making, IEEE Circuits and Systems Magazine, vol.6, issue.3, pp.21-45, 2006.
DOI : 10.1109/MCAS.2006.1688199

P. Pudlák, Semantic selection of premisses for automated theorem proving, pp.27-44

A. Quaife, Automated Development of Fundamental Mathematical Theories, Kluwer, 1992.

R. ?eh??ek and P. Sojka, Software framework for topic modelling with large corpora, New Challenges for NLP Frameworks 2010, pp.45-50, 2010.

A. Roederer, Y. Puzis, and G. Sutcliffe, Divvy: An ATP Meta-system Based on Axiom Relevance Ordering, Conference on Automated Deduction (CADE-22), pp.157-162, 2009.
DOI : 10.1007/978-3-540-71070-7_37

P. Rudnicki, Obvious inferences, Journal of Automated Reasoning, vol.3, issue.4, pp.383-393, 1987.
DOI : 10.1007/BF00247436

J. M. Rushby, Tutorial: Automated Formal Methods with PVS, SAL, and Yices, Fourth IEEE International Conference on Software Engineering and Formal Methods (SEFM'06), p.262, 2006.
DOI : 10.1109/SEFM.2006.37

S. Schulz, Learning Search Control Knowledge for Equational Deduction, DISKI. Infix, vol.230, 2000.

S. Schulz, First-order deduction for large knowledge bases, Deduction at Scale 2011 Seminar, 2011.

D. Sculley, Rank Aggregation for Similar Items, SIAM International Conference on Data Mining (SDM07), pp.587-592, 2007.
DOI : 10.1137/1.9781611972771.66

J. Siekmann, C. Benzmüller, A. Fiedler, A. Meier, I. Normann et al., Proof Development with ???mega: The Irrationality of $$\sqrt 2$$, Thirty Five Years of Automating Mathematics, pp.271-314, 2003.
DOI : 10.1007/978-94-017-0253-9_11

J. K. Slaney, L. Ewing, W. Lusk, and . Mccune, SCOTT: Semantically constrained otter system description, Bundy [36], pp.764-768
DOI : 10.1007/3-540-58156-1_56

K. Slind, M. J. Gordon, R. J. Boulton, and A. Bundy, System description: An interface between CLAM and HOL, Conference on Automated Deduction (CADE-15), volume 1421 of LNCS, pp.134-138, 1998.
DOI : 10.1007/BFb0054255

S. Smolka and J. C. Blanchette, Robust, semiintelligible Isabelle proofs from ATP proofs, pp.117-132

G. Sutcliffe, SEMANTIC DERIVATION VERIFICATION: TECHNIQUES AND IMPLEMENTATION, International Journal on Artificial Intelligence Tools, vol.15, issue.06, pp.1053-1070, 2006.
DOI : 10.1142/S0218213006003119

G. Sutcliffe, The TPTP World ??? Infrastructure for Automated Reasoning, Logic for Programming , Artificial Intelligence, and Reasoning (LPAR-16), pp.1-12, 2010.
DOI : 10.1007/978-3-642-17511-4_1

G. Sutcliffe, J. Urban, and S. Schulz, Empirically Successful Automated Reasoning in Large Theories, CEUR Workshop Proceedings. CEUR-WS.org, 2007.

J. Urban, MPTP ? Motivation, Implementation, First Experiments, Journal of Automated Reasoning, vol.21, issue.2, pp.319-339, 2004.
DOI : 10.1007/s10817-004-6245-1

J. Urban, MizarMode???an integrated proof assistance tool for the Mizar way of formalizing mathematics, Journal of Applied Logic, vol.4, issue.4, pp.414-427, 2006.
DOI : 10.1016/j.jal.2005.10.004

J. Urban, MoMM ??? FAST INTERREDUCTION AND RETRIEVAL IN LARGE LIBRARIES OF FORMALIZED MATHEMATICS, International Journal on Artificial Intelligence Tools, vol.15, issue.01, pp.109-130, 2006.
DOI : 10.1142/S0218213006002588

J. Urban, MPTP 0.2: Design, Implementation, and Initial Experiments, Journal of Automated Reasoning, vol.15, issue.1, pp.21-43, 2006.
DOI : 10.1007/s10817-006-9032-3

J. Urban and . Xml-izing-mizar, Making semantic processing and presentation of MML easy, Mathematical Knowledge Management (MKM 2005), pp.346-360, 2006.

J. Urban, MaLARea: A metasystem for automated reasoning in large theories, pp.45-58

J. Urban, Content-based encoding of mathematical and code libraries, Proceedings of the ITP 2011 Workshop on Mathematical Wikis (MathWikis), number 767 in CEUR Workshop Proceedings, pp.49-53, 2011.

J. Urban, BliStr: The Blind Strategymaker. CoRR, abs, 1301.

J. Urban, K. Hoder, and A. Voronkov, Evaluation of Automated Theorem Proving on the Mizar Mathematical Library, International Congress on Mathematical Software, pp.155-166, 2010.
DOI : 10.1007/978-3-642-15582-6_30

J. Urban, P. Rudnicki, and G. Sutcliffe, ATP and Presentation Service for Mizar Formalizations, Journal of Automated Reasoning, vol.2, issue.2, pp.229-241, 2013.
DOI : 10.1007/s10817-012-9269-y

URL : http://arxiv.org/abs/1109.0616

J. Urban and G. Sutcliffe, ATP-based Cross-Verification of Mizar Proofs: Method, Systems, and First Experiments, Mathematics in Computer Science, vol.2, issue.2, pp.231-251, 2008.
DOI : 10.1007/s11786-008-0053-7

J. Urban and G. Sutcliffe, Automated Reasoning and Presentation Support for Formalizing Mathematics in Mizar, pp.132-146
DOI : 10.1007/978-3-642-14128-7_12

J. Urban, G. Sutcliffe, P. Pudlák, and J. Vysko?il, MaLARea SG1 - Machine Learner for Automated Reasoning with Semantic Guidance, Armando et al. [7], pp.441-456
DOI : 10.1007/978-3-540-71070-7_37

J. Urban, G. Sutcliffe, S. Trac, and Y. Puzis, Combining Mizar and TPTP semantic presentation and verification tools, Studies in Logic, Grammar and Rhetoric, pp.121-136, 2009.
DOI : 10.1007/11618027_23

J. Urban, J. Vysko?il, and P. ?t?pánek, MaLeCoP Machine Learning Connection Prover, Automated Reasoning with Analytic Tableaux and Related Methods, pp.263-277, 2011.
DOI : 10.1007/s10817-006-9032-3

URL : http://repository.ubn.ru.nl/bitstream/2066/92021/1/92021.pdf

K. Verchinine, A. V. Lyaletski, and A. Paskevich, System for Automated Deduction (SAD): A Tool for Proof Verification, Conference on Automated Deduction (CADE-21), pp.398-403, 2007.
DOI : 10.1007/978-3-540-73595-3_29

R. Veroff, Using hints to increase the effectiveness of an automated reasoning program: Case studies, Journal of Automated Reasoning, vol.29, issue.3, pp.223-239, 1996.
DOI : 10.1007/BF00252178

T. Weber, SMT solvers: new oracles for the HOL theorem prover, International Journal on Software Tools for Technology Transfer, vol.7, issue.1, pp.419-429, 2011.
DOI : 10.1007/s10009-011-0188-8

C. Weidenbach, Combining Superposition, Sorts and Splitting, Handbook of Automated Reasoning, pp.1965-2013, 2001.
DOI : 10.1016/B978-044450813-3/50029-1

URL : http://hdl.handle.net/11858/00-001M-0000-000F-31F3-8

J. Zimmer, A. Meier, G. Sutcliffe, and Y. Zhan, Integrated proof transformation services, Computer-Supported Mathematical Theory Development, pp.33-48, 2004.