Gamma-semigroups with Unities and Morita Equivalence for Monoids. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 6, n. 1, p. 1–10, 2013. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/1726. Acesso em: 21 nov. 2024.