El Mourabit, Imane, et al. “Identification of Online Learning Challenges During the COVID-19 Pandemic in Developing Countries: A Case Study of a Metropolis Faculty of Sciences”. International Journal of Emerging Technologies in Learning (iJET), vol. 18, no. 08, Apr. 2023, pp. pp. 238-258, doi:10.3991/ijet.v18i08.36747.