M. Storey, L. Cheng, I. Bull, и P. Rigby. CSCW '06: Proceedings of the 2006 20th anniversary conference on Computer supported cooperative work, стр. 195--198. New York, NY, USA, ACM, (2006)
D. Millen, J. Feinberg, и B. Kerr. CHI '06: Proceedings of the SIGCHI conference on Human Factors in computing systems, стр. 111--120. New York, NY, USA, ACM, (2006)
D. Millen, J. Feinberg, и B. Kerr. CHI '06: Proceedings of the SIGCHI conference on Human Factors in computing systems, стр. 111--120. New York, NY, USA, ACM Press, (2006)