G. Boella, L. van der Torre, и S. Villata. HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (июля 2009)
B. Hecht, и D. Gergle. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '10), Atlanta, GA, USA, стр. 291--300. New York, ACM, (2010)