R. M. H. Al-Sayyed, W. A. Hijawi, A. M. Bashiti, I. AlJarah, N. Obeid, and O. Y. A. Al-Adwan, “An Investigation of Microsoft Azure and Amazon Web Services from Users’ Perspectives”, Int. J. Emerg. Technol. Learn., vol. 14, no. 10, pp. pp. 217–241, May 2019.