Nasr, Dr.Mona M., and Shimaa Ouf. “A Proposed Smart E-Learning System Using Cloud Computing Services: PaaS, IaaS and Web 3.0”. International Journal of Emerging Technologies in Learning (iJET), vol. 7, no. 3, Sept. 2012, pp. pp. 19-24, doi:10.3991/ijet.v7i3.2066.