1. Ratan, R., Ritterfeld, U.: Classifying serious games. In: Ritterfeld, U., Cody, M., Vorderer, P. (eds.) Serious Games: Mechanisms and Effects, pp. 10–22. Routledge, New York (2009)
2. Prensky, M.: Digital Game-Based Learning. Paragon House, St. Paul (2007)
3. Abt, C.C.: Serious Games. University Press of America (1987)
4. Gee, J.P.: Reflections on empirical evidence on games and learning. In: Tobias, S., Fletcher, J.D. (eds.) Computer Games and Instruction, pp. 223–232. IAP (2011)
5. Squire, K.R.: Video Games and Learning: Teaching and Participatory Culture in the Digital Age. Teachers College Press, New York (2011)