K. Karahalios, и J. Donath. CHI '04: Proceedings of the SIGCHI conference on Human factors in computing systems, стр. 615--622. New York, NY, USA, ACM, (2004)
M. Jansen, P. Rossmanith, I. Uzun, и U. Hoppe. Wireless and Mobile Technologies in Education, 2005. WMTE 2005. IEEE International Workshop on, (ноября 2005)
E. Huang, D. Russell, и A. Sue. CHI '04: Proceedings of the SIGCHI conference on Human factors in computing systems, стр. 279--286. New York, NY, USA, ACM, (2004)
L. Holmquist, J. Redström, и P. Ljungstr. Handheld and Ubiquitous Computing, Lecture Notes in Computer Science No. 1707, стр. 234--245. Springer-Verlag, (1999)
S. Harrison, и P. Dourish. CSCW '96: Proceedings of the 1996 ACM conference on Computer supported cooperative work, стр. 67--76. New York, NY, USA, ACM, (1996)