Fidelis Odinma Chete and Roosevelt Abandy. “Integration of Unstructured Supplementary Service Data (USSD) Into A University’s Portal”. NIPES - Journal of Science and Technology Research 4, no. 4 (December 2, 2022). Accessed September 20, 2024. https://journals.nipes.org/index.php/njstr/article/view/395.