M. Bienkowski, J. Brecht, and J. Klo, The learning registry, Proceedings of the 2nd International Conference on Learning Analytics and Knowledge, LAK '12, 2012.
DOI : 10.1145/2330601.2330651

V. Butoianu, Share and reuse of context metadata resulting from interactions between users and heterogeneous web-based learning environments, 2013.

H. Drachsler, L. Rutledge, P. Van-rosmalen, H. Hummel, D. Pecceu et al., ReMashed - An Usability Study of a Recommender System for Mash-Ups for Learning, SI: ICL2009), pp.7-11, 2010.
DOI : 10.3991/ijet.v5s1.1191

R. Ferguson, Learning analytics: drivers, developments and challenges, International Journal of Technology Enhanced Learning, vol.4, issue.5/6, pp.304-317, 2012.
DOI : 10.1504/IJTEL.2012.051816
URL : http://oro.open.ac.uk/36374/1/IJTEL40501_Ferguson%20Jan%202013.pdf

R. Ferguson and S. B. Shum, Social learning analytics, Proceedings of the 2nd International Conference on Learning Analytics and Knowledge, LAK '12, 2012.
DOI : 10.1145/2330601.2330616

B. Florian, C. Glahn, H. Drachsler, M. Specht, and R. F. Gesa, Activity-Based Learner-Models for Learner Monitoring and Recommendations in Moodle, Lecture Notes in Computer Science, vol.11, issue.2, pp.111-124, 2011.
DOI : 10.1007/978-3-540-75195-3_5

C. Ghidini, V. Pammer, P. Scheir, L. Serafini, and S. Lindstaedt, APOSDLE: Learn@ work with semantic web technology, Proceedings of the IMEDIA and I- SEMANTICS, 2007.

C. Glahn, M. Specht, and R. Koper, Smart Indicators on Learning Interactions, Proceedings of the 2nd European Conference on Technology Enhanced Learning, 2007.
DOI : 10.1007/978-3-540-75195-3_5
URL : http://dspace.ou.nl/bitstream/1820/941/1/glahn_specht_koper_smart_indicators_ec-tel.pdf

A. Harrer, A. Martínez-monés, and A. Dimitracopoulou, Users??? Data, Technology- Enhanced Learning, pp.175-193, 2009.
DOI : 10.1007/978-1-4020-9827-7_11

X. N. Lam, T. Vu, T. D. Le, and A. D. Duong, Addressing cold-start problem in recommendation systems, Proceedings of the 2nd international conference on Ubiquitous information management and communication , ICUIMC '08, 2008.
DOI : 10.1145/1352793.1352837

G. D. Magoulas, Y. Papanikolaou, and M. Grigoriadou, Adaptive web-based learning: accommodating individual differences through system's adaptation, British Journal of Educational Technology, vol.47, issue.4, pp.511-527, 2003.
DOI : 10.1023/A:1003071617564
URL : http://www.dcs.bbk.ac.uk/~gmagoulas/bjet.pdf

N. Manouselis, H. Drachsler, K. Verbert, and O. C. Santos, Workshop on recommender systems for technology enhanced learning, Proceedings of the fourth ACM conference on Recommender systems, RecSys '10, pp.377-378, 2010.
DOI : 10.1145/1864708.1864797

N. Manouselis and R. Vuorikari, What If Annotations Were Reusable: A Preliminary Discussion, Lecture Notes in Computer Science, vol.22, issue.1, pp.255-264, 2009.
DOI : 10.4018/978-1-59904-543-6.ch005
URL : http://dspace.ou.nl/bitstream/1820/2144/1/56.pdf

A. Martínez-monés, A. Harrer, and Y. Dimitriadis, An Interaction-Aware Design Process for the Integration of Interaction Analysis into Mainstream CSCL Practices, Analyzing interactions in CSCL, pp.269-291, 2011.
DOI : 10.1007/978-1-4419-7710-6_13

A. Mikroyannidis, A. Gomez-goiri, J. Domingue, C. Tranoris, D. Pareit et al., Deploying learning analytics for awareness and reflection in online scientific experimentation, Proceedings of the 5th Workshop on Awareness and Reflection in Technology Enhanced Learning, 2015.

X. Ochoa, S. Ternier, G. Parra, and E. Duval, A Context-Aware Service Oriented Framework for Finding, Recommending and Inserting Learning Objects, Lecture Notes in Computer Science, vol.4227, pp.697-702, 2006.
DOI : 10.1007/11876663_75
URL : http://ariadne.cti.espol.edu.ec/xavier/papers/Ochoa-ECTEL2006.pdf

C. Romero, S. Ventura, P. Espejo, and C. Hervas, Data mining algorithms to classify students, Proceedings of the 1st International Conference on Educational Data Mining, 2008.

V. A. Romero-zaldivar, A. Pardo, D. Burgos, and C. Delgado-kloos, Monitoring student progress using virtual appliances: A case study, Computers & Education, vol.58, issue.4, pp.1058-1067, 2012.
DOI : 10.1016/j.compedu.2011.12.003
URL : https://e-archivo.uc3m.es/bitstream/10016/19207/1/monitoring_pardo_kloos_CE_2012_ps.pdf

J. L. Santos, K. Verbert, S. Govaerts, and E. Duval, Visualizing PLE usage, Proceedings of the 1st Workshop on Exploring the Fitness and Evolvability of Personal Learning Environments, 2011.

J. B. Schafer, D. Frankowski, J. Herlocker, and S. Sen, Collaborative Filtering Recommender Systems, Lecture Notes in Computer Science, vol.4321, pp.291-324, 2007.
DOI : 10.1007/978-3-540-72079-9_9
URL : http://web.cs.wpi.edu/~rich/courses/cs525u/readings/SchaferEtAl2007.pdf

H. C. Schmitz, M. Wolpers, U. Kirschenmann, and K. Niemann, Contextualized attention metadata, Human Attention in Digital Environments, pp.186-209, 2011.
DOI : 10.1017/CBO9780511974519.008

K. Verbert, H. Drachsler, N. Manouselis, M. Wolpers, R. Vuorikari et al., Dataset-driven research for improving recommender systems for learning, Proceedings of the 1st International Conference on Learning Analytics and Knowledge, LAK '11, pp.44-53, 2011.
DOI : 10.1145/2090116.2090122
URL : http://dspace.ou.nl/bitstream/1820/3298/1/Verbert_LAK2011_dataTEL.pdf

K. Verbert, N. Manouselis, H. Drachsler, and E. Duval, Dataset-driven research to support learning and knowledge analytics, Educational Technology & Society, vol.15, issue.3, pp.133-148, 2012.

R. Vuorikari and F. Van-assche, Collaborative content enrichment in multilingual Europe, European Schoolnet approach on educational resources, Proceedings of the 3rd International Conference on Automated Production of Cross Media Content for Multi-Channel Distribution, 2007.

M. Wolpers, M. Memmel, and A. Giretti, Metadata in Architecture Education - First Evaluation Results of the MACE System, Lecture Notes in Computer Science, vol.49, issue.4, pp.112-126, 2009.
DOI : 10.1045/april2002-weibel

T. Zschocke, J. Beniest, C. Paisley, J. Najjar, and E. Duval, The LOM application profile for agricultural learning resources of the CGIAR, International Journal of Metadata, Semantics and Ontologies, vol.4, issue.1/2, pp.13-23, 2009.
DOI : 10.1504/IJMSO.2009.026250