Henry E. Amhenrior, Braimoh A. Ikharo. “GSM Value Added Services (VAS) Provision from Intelligent Network (IN) Platform Through GSM-IN Integration”. NIPES - Journal of Science and Technology Research 4, no. 3 (September 2, 2022). Accessed September 20, 2024. https://journals.nipes.org/index.php/njstr/article/view/381.