V. Devedzic, J. Good, A. Harrer, R. Luckin, D. Pearce, S. Retalis, and J. Robertson. Artificial Intelligence in Education - Building Technology Rich Learning Contexts that Work, volume 158 of Frontiers in Artificial Intelligence and Applications, page 715. Amsterdam, IOS Press, (2007)
Y. Dimitriadis, P. Goodyear, and S. Retalis. Computers in Human Behavior, 25 (5):
997 - 998(2009)Including the Special Issue: Design Patterns for Augmenting E-Learning Experiences.