M. Muller. The human-computer interaction handbook: fundamentals, evolving technologies and emerging applications, L. Erlbaum Associates Inc., Hillsdale, NJ, (2002)
S. Frizell, и R. Hubscher. Proceedings of World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education 2002, стр. 298-304. Chesapeake, VA, AACE, (2002)