AHMADIDELIR, K.; DOOSTIE, H.; GHOLAMI, R. On the structure of generalized polyhedral semigroups with zero deficiency. Tamkang Journal of Mathematics, [S. l.], v. 42, n. 2, p. 135–147, 2010. DOI: 10.5556/j.tkjm.42.2011.621. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/621. Acesso em: 27 apr. 2024.