SHEA, Peter. Introduction to Online Learning Volume 23, Issue 1. Online Learning, Boston, MA, v. 23, n. 1, 2019. DOI: 10.24059/olj.v23i1.1965. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/1965. Acesso em: 25 mar. 2026.