ZAMAN, B. U. On left restriction semigroups with zero: DOI: 10.48129/kjs.16921. Kuwait Journal of Science, [S. l.], v. 50, n. 2A, 2023. DOI: 10.48129/kjs.16921. Disponível em: https://journals.ku.edu.kw/kjs/index.php/KJS/article/view/16921. Acesso em: 6 may. 2026.