FANFARELLI, Joseph R; MCDANIEL, Rudy. Exploring Digital Badges in University Courses: Relationships between Quantity, Engagement, and Performance. Online Learning, Boston, MA, v. 21, n. 2, 2017. DOI: 10.24059/olj.v21i2.1007. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/1007. Acesso em: 4 apr. 2026.