G. H. Shakah, A. T. Al-Oqaily, and F. Alqudah, “Motivation Path between the Difficulties and Attitudes of Using the E-Learning Systems in the Jordanian Universities: Aajloun University as a Case Study”, Int. J. Emerg. Technol. Learn., vol. 14, no. 19, pp. pp. 26–48, Oct. 2019.