A. M, B. . “Isomorphism Theorems of Triple Direct Product Convergent Semigroup of Geometric Progression”. International Journal of Formal Sciences: Current and Future Research Trends, vol. 7, no. 01, Sept. 2020, pp. 1-6, https://ijfscfrtjournal.isrra.org/index.php/Formal_Sciences_Journal/article/view/558.