WASET
    Shubat S. Ahmeda and  Ashraf M. Ali Edwila,  Secure Protocol for Short Message Service.   journal   = {International Journal of Information and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2009, vol. 25(1). 169 - 173
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/589.