SOBODIć, Aleksandra; BALABAN, Igor; KERMEK, Dragutin. Usability Metrics for Gamified E-learning Course: A Multilevel Approach. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 13, n. 05, p. pp. 41–55, 2018. DOI: 10.3991/ijet.v13i05.8425. Disponível em: https://online-journals.org/index.php/i-jet/article/view/8425. Acesso em: 22 nov. 2024.