A. Dattolo, F. Ferrara, and C. Tasso. Proc. of the 3rd International Conference on Human System Interaction - HSI'2010, page 548-555. Rzeszow, Poland, IEEE press, (May 2010)
A. Dattolo, F. Tomasi, and F. Vitali. Handbook of Research on Web 2.0, 3.0 and X.0: Technologies, Business, and Social Applications, chapter 20, IGI Global, Hershey, PA, (2010)
J. Gemmell, A. Shepitsen, M. Mobasher, and R. Burke. Proceedings of the 6th Workshop on Intelligent Techniques for Web Personalization and Recommender Systems, (July 2008)
T. Bogers, and A. van den Bosch. Proceedings of the ACM RecSys'09 Workshop on Recommender Systems & the Social Web, page 9-16. New-York, NY, USA, (2009)
A. Hotho, R. Jäschke, C. Schmitz, and G. Stumme. The Semantic Web: Research and Applications, volume 4011 of Lecture Notes in Computer Science, page 411--426. Heidelberg, Springer, (June 2006)
C. Cattuto, D. Benz, A. Hotho, and G. Stumme. The Semantic Web -- ISWC 2008, volume 5318 of Lecture Notes in Computer Science, page 615--631. Berlin/Heidelberg, Springer, (2008)