W. Johnson. AIED 2007: Proc. 13th Int'l Conf. on Artificial
Intelligence in Education, Building Technology Rich Learning Contexts
That Work, том 158 из Frontiers in Artificial Intelligence and Applications, Los Angeles, CA, USA, IOS Press, (2007)
C. Seals, M. Rosson, J. Carroll, T. Lewis, и L. Colson. Proc. IEEE CS Int'l Sym. on Human-Centric Computing
Languages and Environments, стр. 177. Los Alamitos, CA, USA, IEEE Computer Society, (2002)