A. M, Babayo. “Isomorphism Theorems of Triple Direct Product Convergent Semigroup of Geometric Progression”. International Journal of Formal Sciences: Current and Future Research Trends 7, no. 01 (September 17, 2020): 1–6. Accessed December 16, 2025. https://ijfscfrtjournal.isrra.org/Formal_Sciences_Journal/article/view/558.