1. Michael Allen's Guide to e-Learning
2. Cooperation, dialogue and ethics
3. Investigating an online museum’s information system: Instructional design for effective human-computer interaction;A.Alwi;D.Ifenthaler, Kinshuk
4. Bagley, C. A., & Heltne, M. (2003). Cooperative Teams. Paper presented at the Collaboration Conference, Radisson South, Bloomington, MN.