Boonlert Watjatrakul,  Determinants of Students- Intentions to Use a Mobile Messaging Service in Educational Institutions: a Theoretical Model.   journal   = {International Journal of Information and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2011, vol. 49(1). 15 - 20
    [viewed 23 February 2020]. Available from: https://publications.waset.org/pdf/8365.