YEN, C.-T. ON THE COMMUTATIVITY AND ANTICOMMUTATIVITY OF RINGS II. Tamkang Journal of Mathematics, [S. l.], v. 22, n. 3, p. 267–270, 1991. DOI: 10.5556/j.tkjm.22.1991.4610. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4610. Acesso em: 24 apr. 2024.