F. Abel, N. Henze, и D. Krause. WWW '08: Proceeding of the 17th international conference on World Wide Web, стр. 1147--1148. New York, NY, USA, ACM, (2008)
J. Kim, R. Farzan, и P. Brusilovsky. HT '08: Proceedings of the nineteenth ACM conference on Hypertext and hypermedia, стр. 233--234. New York, NY, USA, ACM, (2008)
J. Kim, R. Farzan, и P. Brusilovsky. BooksOnline '08: Proceeding of the 2008 ACM workshop on Research advances in large digital book repositories, стр. 25--28. New York, NY, USA, ACM, (2008)
R. Farzan, и P. Brusilovsky. HT '08: Proceedings of the nineteenth ACM conference on Hypertext and hypermedia, стр. 203--212. New York, NY, USA, ACM, (2008)