INDLEKOFER, K.-H.; KAYA, E. Remarks on number theory over additive arithmetical semigroups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 72, n. 3, p. 371–390, 2020. DOI: 10.37863/umzh.v72i3.6042. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6042. Acesso em: 5 dec. 2025.