Okwany, I, D Odongo, and N.B Okelo. “Characterizations of Finite Semigroups of Multiple Operators”. International Journal of Modern Computation, Information and Communication Technology 1, no. 2 (December 28, 2018): 116–120. Accessed February 5, 2026. https://gjpublications.com/index.php/IJMCICT/article/view/30.