ASHRAF, M.; QUADRI, M. A.; JACOB, V. W. COMMUTATIVITY OF RIGHT $S$-UNITAL RINGS UNDER SOME POLYNOMIAL CONSTRAINTS. Tamkang Journal of Mathematics, [S. l.], v. 24, n. 1, p. 23–28, 1993. DOI: 10.5556/j.tkjm.24.1993.4470. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4470. Acesso em: 2 may. 2024.