R. Burke-]-b, J. Gipp, C. Beel, C. Hentschel, H. Basu et al., Scienstein: A Research Paper Recommender System Technical paper recommendation: a study in combining multiple information sources Context-aware citation recommendation A Multi-criteria Collaborative Filtering Approach for Research Paper Recommendation in Papyres A Multidimensional Paper Recommender: Experiments and Evaluations On the recommending of citations for research papers Enhancing digital libraries with TechLens+, Hybrid Recommender Systems: Survey and Experiments Proceedings of the 19th international conference on World wide web Proceedings of the 2002 ACM conference on Computer supported cooperative work Proceedings of the 4th ACM/IEEE-CS joint conference on Digital libraries Multi-criteria Collaborative Filtering Approach for Research Paper Recommendation in Papyres Babin, P. Kropf, and M. Weiss, pp.331-370, 2001.

A. Paramythis, S. Weibelzahl, and J. Masthoff, Layered evaluation of interactive adaptive systems: framework and formative methods, User Modeling and User-Adapted Interaction, vol.15, issue.3-4, pp.383-453, 2010.
DOI : 10.1007/s11257-010-9082-4

S. Watanabe, T. Ito, T. Ozono, and T. Shintani, A paper recommendation mechanism for the research support system Papits, International Workshop on Data Engineering Issues in E-Commerce, pp.71-80, 2005.
DOI : 10.1109/DEEC.2005.3

D. W. Stewart and P. N. Shamdasani, Focus groups: theory and practice, 1990.
DOI : 10.4135/9781412991841

T. Tang and G. Mccalla, Smart Recommendation for an Evolving E-Learning System: Architecture and Experiment, Int. J. E-Learn, vol.4, issue.1, pp.105-129, 2005.

T. Y. Tang and G. Mccalla, A Multidimensional Paper Recommender: Experiments and Evaluations, IEEE Internet Computing, vol.13, issue.4, pp.34-41, 2009.
DOI : 10.1109/MIC.2009.73

P. Winoto, T. Y. Tang, and G. I. Mccalla, Contexts in a paper recommendation system with collaborative filtering, The International Review of Research in Open and Distributed Learning, vol.13, issue.5, pp.56-75, 2012.
DOI : 10.19173/irrodl.v13i5.1243

R. Manouselis, F. Vuorikari, and . Van-assche, Collaborative recommendation of e-learning resources: an experimental investigation, Journal of Computer Assisted Learning, vol.8, issue.4, pp.227-242, 2010.
DOI : 10.1111/j.1365-2729.2010.00362.x

F. Zarrinkalam and M. Kahani, A multi-criteria hybrid citation recommendation system based on linked data, 2012 2nd International eConference on Computer and Knowledge Engineering (ICCKE), pp.283-288, 2012.
DOI : 10.1109/ICCKE.2012.6395393

N. F. Matsatsinis, K. Lakiotaki, and P. Delias, A System based on Multiple Criteria Analysis for Scientific Paper Recommendation, 11th Panhellenic Conference in Informatics, pp.135-149, 2007.

B. P. Knijnenburg, M. C. Willemsen, Z. Gantner, H. Soncu, and C. Newell, Explaining the user experience of recommender systems, User Modeling and User-Adapted Interaction, vol.42, issue.2, pp.4-5, 2012.
DOI : 10.1007/s11257-011-9118-4

N. Tintarev, Explanations of recommendations, Proceedings of the 2007 ACM conference on Recommender systems , RecSys '07, pp.203-206, 2007.
DOI : 10.1145/1297231.1297275