X. Song, B. Tseng, C. Lin, и M. Sun. Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval, стр. 509--516. New York, NY, USA, ACM, (2006)
A. Wexelblat, и P. Maes. Proceedings of the SIGCHI conference on Human factors in computing systems: the CHI is the limit, стр. 270--277. New York, NY, USA, ACM, (1999)
M. Svensson, K. Höök, J. Laaksolahti, и A. Waern. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, стр. 341--348. New York, NY, USA, ACM, (2001)
D. Maltz, и K. Ehrlich. Proceedings of the SIGCHI conference on Human factors in computing systems, стр. 202--209. New York, NY, USA, ACM Press/Addison-Wesley Publishing Co., (1995)
U. Shardanand, и P. Maes. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, стр. 210--217. New York, NY, USA, ACM Press/Addison-Wesley Publishing Co., (1995)
M. Bilandzic, M. Foth, и A. De Luca. Proceedings of the 7th ACM Conference on Designing Interactive Systems, стр. 174--183. New York, NY, USA, ACM, (2008)
W. Xu, K. Kreijns, и J. Hu. Technologies for E-Learning and Digital Entertainment, том 3942 из Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2006)