CARVER, Lin; MUHKERJEE, Keya; LUCIO, Robert. Correlation between Grades Earned and Time in Online Courses. Online Learning, Boston, MA, v. 21, n. 4, 2017. DOI: 10.24059/olj.v21i4.1013. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/1013. Acesso em: 2 jun. 2026.