H. Roinestad, J. Burgoon, B. Markines, und F. Menczer. HT '09: Proceedings of the 20th ACM conference on Hypertext and hypermedia, Seite 327--328. New York, NY, USA, ACM, (2009)
L. von Ahn, und L. Dabbish. CHI '04: Proceedings of the SIGCHI conference on Human factors in computing systems, Seite 319--326. New York, NY, USA, ACM, (2004)
H. Roinestad, J. Burgoon, B. Markines, und F. Menczer. HT '09: Proceedings of the 20th ACM conference on Hypertext and hypermedia, Seite 327--328. New York, NY, USA, ACM, (2009)
B. Kules, R. Capra, M. Banta, und T. Sierra. JCDL '09: Proceedings of the 9th ACM/IEEE-CS joint conference on Digital libraries, Seite 313--322. New York, NY, USA, ACM, (2009)
P. Schonhofen. WI '06: Proceedings of the 2006 IEEE/WIC/ACM International Conference on Web Intelligence, Seite 456--462. Washington, DC, USA, IEEE Computer Society, (2006)
J. Hu, G. Wang, F. Lochovsky, J. tao Sun, und Z. Chen. WWW '09: Proceedings of the 18th international conference on World wide web, Seite 471--480. New York, NY, USA, ACM, (2009)
E. Gabrilovich, und S. Markovitch. AAAI'06: proceedings of the 21st national conference on Artificial intelligence, Seite 1301--1306. AAAI Press, (2006)