OKWANY, I; ODONGO, D; OKELO, N.B. Characterizations of Finite Semigroups of Multiple Operators. International Journal of Modern Computation, Information and Communication Technology, [S. l.], v. 1, n. 6, p. 116–120, 2018. DOI: 10.65000/6jz7cb38. Disponível em: https://gjpublications.com/index.php/IJMCICT/article/view/30. Acesso em: 22 oct. 2025.