NYAMSUREN, E.; VAN DER MAAS, H. L.; MAURER, M. Set-theoretical and Combinatorial Instruments for Problem Space Analysis in Adaptive Serious Games. International Journal of Serious Games, [S. l.], v. 5, n. 1, 2018. DOI: 10.17083/ijsg.v5i1.219. Disponível em: https://journal.seriousgamessociety.org/index.php/IJSG/article/view/219. Acesso em: 19 oct. 2021.