YEN, C.-T. RINGS WITH ASSOCIATORS IN THE LEFT AND MIDDLE NUCLEUS. Tamkang Journal of Mathematics, [S. l.], v. 23, n. 4, p. 363–369, 1992. DOI: 10.5556/j.tkjm.23.1992.4560. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4560. Acesso em: 19 apr. 2024.