S. Faridani, E. Bitton, K. Ryokai, and K. Goldberg. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, page 1175--1184. New York, NY, USA, ACM, (2010)
P. Brusilovsky. SOFSEM 2008: Theory and Practice of Computer Science, volume 4910 of Lecture Notes in Computer Science, chapter 2, Springer Berlin / Heidelberg, Berlin, Heidelberg, (2008)
A. Ankolekar, M. Krötzsch, T. Tran, and D. Vrandecic. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 825--834. New York, NY, USA, ACM Press, (2007)
J. Thom-Santelli, M. Muller, and D. Millen. CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, page 1041--1044. New York, NY, USA, ACM, (2008)
O. Nov, M. Naaman, and C. Ye. CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, page 1097--1100. New York, NY, USA, ACM, (2008)
P. Jurczyk, and E. Agichtein. Proceedings of the sixteenth ACM conference on Conference on information and knowledge management, page 919--922. New York, NY, USA, ACM, (2007)
F. Carmagnola, F. Cena, and C. Gena. Knowledge-Based Intelligent Information and Engineering Systems, volume 4694 of Lecture Notes in Computer Science, chapter 91, Springer Berlin / Heidelberg, Berlin, Heidelberg, (2010)