WELLMAN, Gregory S.; MARCINKIEWICZ, Henryk. ONLINE LEARNING AND TIME-ON-TASK: IMPACT OF PROCTORED VS. UN-PROCTORED TESTING. Online Learning, Boston, MA, v. 8, n. 4, 2019. DOI: 10.24059/olj.v8i4.1813. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/1813. Acesso em: 25 mar. 2026.