Boussis , Wassila. “Strategy to Close Educational Institutions to Limit the Spread of the Covid 19 Virus - Challenges of Digitization and Distance Education”. Social Empowerment Journal 2, no. 3 (September 30, 2020): 20-33. Accessed May 17, 2024. http://journals.lagh-univ.dz/index.php/sej/article/view/850.