1. Aarseth, E. (2001). Computer game studies, year one. Game Studies, 1(1), 1–15.
2. Amory, A. (2007). Game object model version II: A theoretical framework for educational game development. Educational Technology Research and Development,
55(1), 51–77.
3. Bartle, R. A. (2004). Designing virtual worlds. Indianapolis: New Riders Publishing.
4. Bishop, S. R., Lau, M., Shapiro, S., Carlson, L., Anderson, N. D., Carmody, J., et al. (2004). Mindfulness: A proposed operational definition. Clinical psychology: Science and Practice,
11(3), 230–241.
5. Brown, E., & Cairns, P. (2004). A grounded investigation of game immersion. New York: ACM.