J. Carroll, G. Chin, M. Rosson, and D. Neale. Proceedings of the 3rd conference on Designing interactive systems: processes, practices, methods, and techniques, page 239--251. ACM, (2000)
J. Middleton, S. Gorard, C. Taylor, and B. Bannan-Ritland. Handbook of design research methods in education: Innovations in science, technology, engineering, and mathematics learning and teaching, (2008)
Y. Kali, R. Levin-Peled, and Y. Dori. Computers in Human Behavior, 25 (5):
1067 - 1078(2009)Including the Special Issue: Design Patterns for Augmenting E-Learning Experiences.