HEGEMAN, Jennifer. Using Instructor-Generated Video Lectures in Online Mathematics Courses Improves Student Learning. Online Learning, Boston, MA, v. 19, n. 3, 2015. DOI: 10.24059/olj.v19i3.484. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/484. Acesso em: 25 mar. 2026.