K. Nowak, J. Watt, and J. Walther. Computers in Human Behavior, 25 (5):
1108 - 1119(2009)Including the Special Issue: Design Patterns for Augmenting E-Learning Experiences.
G. Kuhnmünch, and G. Strube. Computers in Human Behavior, 25 (5):
1156 - 1164(2009)Including the Special Issue: Design Patterns for Augmenting E-Learning Experiences.
A. Waraich. ITiCSE '04: Proceedings of the 9th annual SIGCSE conference on Innovation and technology in computer science education, page 97-101. New York, NY, USA, ACM, (2004)