21. Researching "collaborative knowledge building" in formal distance learning environments. Vanessa Paz Dennen, Trena M. Paulus. Page 96.
42. Proactive Behaviour May Lead to Failure in Virtual Project-Based Collaborative Learning. Pernille Bjørn, Morten Hertzum. Page 1.
53. Collaborative Learning Team PBWiki. DePaul University's PM440 Fall 2008 Collaborative Learning Team, Tony Feldhaus, Ruth Hong, Zoaib Mirza, Ahmad Noordin. http://pm440.pbwiki.com/CLT
64. Designing Collaborative Learning Systems: Current Trends & Future Research Agenda. Angelique Dimitracopoulou. Page 116.
75. Principles and Grand Challenges for the Futures: A Prospectus for the Computer-Supported Collaborative Learning (CSCL) Community" Eric Hamilton (2007).
86.<ref>{{cite web|last=Bukvova|first=Helena|title=Enhancing the Framework for Virtual Collaborative Learning: Comparison of two Case Studies|url=http://sprouts.aisnet.org/606/1/2006_03_Bukvova_Gilge_Schoop_EDEN.pdf|publisher=Sprouts|accessdate=2011-09-17}}</ref>
<ref>{{cite web|last=Bukvova|first=Helena|title=Enhancing the Framework for Virtual Collaborative Learning: Comparison of two Case Studies|url=http://sprouts.aisnet.org/606/1/2006_03_Bukvova_Gilge_Schoop_EDEN.pdf|publisher=Sprouts|accessdate=2011-09-17}}</ref>
7. [https://www.cloudshare.com/blog/cloudshare/blogvirtual-learning-everything-you-need-to-know Virtual Learning – Everything You Need to Know] Article By [[CloudShare]]
