HENTZEL, I. R.; YEN, C.-T. RINGSWITH (R,R,R)AND [R,(R,R,R)] IN THE LEFT NUCLEUS. Tamkang Journal of Mathematics, [S. l.], v. 27, n. 2, p. 183–187, 1996. DOI: 10.5556/j.tkjm.27.1996.4358. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4358. Acesso em: 25 apr. 2024.