TAHIR, F.; MITROVIC, A.; SOTARDI, V. Investigating the causal relationships between badges and learning outcomes in SQL-Tutor. Research and Practice in Technology Enhanced Learning, [S. l.], v. 17, 2022. Disponível em: https://rptel.apsce.net/index.php/RPTEL/article/view/2022-17007. Acesso em: 28 nov. 2023.