Henry E. Amhenrior, Braimoh A. Ikharo. GSM Value Added Services (VAS) Provision from Intelligent Network (IN) Platform Through GSM-IN Integration. JSTR [Internet]. 2022 Sep. 2 [cited 2024 Sep. 20];4(3). Available from: https://journals.nipes.org/index.php/njstr/article/view/381