1. Bekkers, C. (2009). Teaching & learning in SL: Figuring out some variables. Retrieved on May 29, 2010, from http://cleobekkers.wordpress.com/ 2009/01/28/ teaching-learning-in-sl- figuring-out-some-variables/
2. Multi-User Virtual Environments for education and training. A critical review of Second Life.;Z. L.Berge;Educational Technology Magazine,2008
3. Bignell, S., & Parson, V. (2010). Best practice in virtual worlds teaching. Retrieved from http://previewpsych.org/ BPD2.0.pdf