Fodor, Szabina, and Balázs Balázs. “An Empirical Study on Key Factors Affecting User Engagement in a Gamified Team Building Environment”. International Journal of Serious Games 7, no. 3 (September 25, 2020): 81–95. Accessed October 27, 2021. https://journal.seriousgamessociety.org/index.php/IJSG/article/view/355.