R. Amant, T. Horton, and F. Ritter. CHI '04: Proceedings of the SIGCHI conference on Human factors in computing systems, page 343-350. New York, NY, USA, ACM Press, (2004)
R. Baecker, D. Nastos, I. Posner, and K. Mawby. CHI '93: Proceedings of the SIGCHI conference on Human factors in computing systems, page 399-405. New York, NY, USA, ACM Press, (1993)
K. Baker, S. Greenberg, and C. Gutwin. CSCW '02: Proceedings of the 2002 ACM conference on Computer supported cooperative work, page 96-105. New York, NY, USA, ACM Press, (2002)
S. Benford, D. Snowdon, A. Colebourne, J. O'Brien, and T. Rodden. GROUP '97: Proceedings of the international ACM SIGGROUP conference on Supporting group work, page 71-80. New York, NY, USA, ACM Press, (1997)