1. Dillenbourg, P., Baker, M., Blaye, A., OMalley, C.: The evolution of research on collaborative learning. In: Learning in Humans and Machine: Towards an Interdisciplinary Learning Science, pp. 189–211 (1996)
2. Hijon, R., Carlos, R.: E-learning platforms analysis and development of students tracking functionality. In: 18th World Conference on Educational Multimedia, Hypermedia and Telecomunications, pp. 2823–2828 (2006)
3. Prensky, M.: Digital Game-Based Learning. MacGraw Hill (2000)
4. Squire, K.: Videogames in education. International Journal of Intelligent Games and Simulations 2, 49–62 (2003)
5. Yu, T.W.: Learning in the virtual world: the pedagogical potentials of massively multiplayer online role playing games. International Education Studies 2(1) (2009)