MATSUDA, R. Note on integral closures of semigroup rings. Tamkang Journal of Mathematics, [S. l.], v. 31, n. 2, p. 137–144, 2000. DOI: 10.5556/j.tkjm.31.2000.405. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/405. Acesso em: 29 mar. 2024.