HOSSEINI, A.; SABBAGHAN, M.; SHIRAZI, F. Ayatollah Zadeh. Codecomposition of a Transformation Semigroup. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 65, n. 11, p. 1506–1514, 2013. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2530. Acesso em: 14 apr. 2025.