AL-AJLAN, A. Measuring Time, Cost, Complexity, Quality, and Security of Ten Free E-Learning Platforms and Their Compliance with Lehman’s Eight Laws. مجلة العلوم الإدارية و الإقتصادية, [S. l.], v. 18, n. 2, p. 585–606, 2025. Disponível em: https://jaes.qu.edu.sa/index.php/jae/article/view/2652. Acesso em: 7 2025.