P. Cobb, E. Yackel, und T. Wood. The Emergence of Mathermatical Meaning: Interactions in Classroom Cultures, Lawrence Erlbaum Associates, Hillside, NJ, (1995)
A. Dearden, J. Finlay, E. Allgar, und B. Mcmanus. CHI 2002, Conference Extended Abstracts on Human Factors in Computer Systems, ACM Press, Minneapolis, Minnesota, USA,. 2002., Seite 664-665. (2002)
A. Dearden, J. Finlay, E. Allgar, und B. Mcmanus. People and Computers XVII: Memorable yet Invisible, Proceedings of HCI'2002, Seite 159-174. Springer Verlag, (2002)