1. Belingard, L., & Peruch, P. (2000). Mental representation and the spatial structure of virtual environments. Environment and Behavior, 32, 427-442.
2. Bell, S., & Saucier, D. (2004). Relationship among environmental pointing accuracy, mental rotation, sex, and hormones. Environment and Behavior, 36, 251-265.
3. Coffman, T., & Klinger, M.B. (2007). Utilizing virtual worlds in education: The implications for practice. International Journal of Social Sciences, 2(1), 29-33.
4. Çubukcu, E., & Nasar, J.L. (2005). Relation of physical form to spatial knowledge in large-scale virtual environments. Environment and Behavior, 37, 397-417.
5. De Lucia, A., Francese, R., Passero, I., & Tortora, G. (2009). Development of a virtual campus on second life: The case of SecondDMI. Computers and Education, 52(1), 220-233.