1. Bartle, R.: Hearts, Clubs, Diamonds, Spades: players who suit MUDs. J. MUD Res. 1(1), 19 (1996)
2. Bartle, R.: Virtual worlds: why people play. Massively Mult. Game Dev. 2(1), 3–18 (2005)
3. Game Development Series;C Bateman,2006
4. Bateman, C., Lowenhaupt, R., Nacke, L.E.: Player typology in theory and practice. In: Proceedings of DiGRA 2011 (2011)
5. Bateman, C., Nacke, L.E.: The neurobiology of play. In: Proceedings of Futureplay 2010, Vancouver, BC, Canada, pp. 1–8. ACM (2010).
https://doi.org/10.1145/1920778.1920780