El-Sofany, H. F., A. Al Tayeb, K. Alghatani, and S. A. El-Seoud. “The Impact of Cloud Computing Technologies in E-Learning”. International Journal of Emerging Technologies in Learning (iJET), vol. 8, no. S1, Jan. 2013, pp. pp. 37-43, doi:10.3991/ijet.v8iS1.2344.