Lim, Tina, Mansor Fadzil, and Norziati Mansor. “Mobile Learning via SMS at Open University Malaysia: Equitable, Effective, and Sustainable”. The International Review of Research in Open and Distributed Learning 12, no. 2 (February 28, 2011): 122–137. Accessed April 17, 2024. https://www.irrodl.org/index.php/irrodl/article/view/926.