VOLOSHYNA, T.V. An analogue of Bernside’s lemma for finite inverse symmetric semigroup. Carpathian Mathematical Publications, [S. l.], v. 2, n. 1, p. 15–23, 2010. Disponível em: https://scijournals.pnu.edu.ua/index.php/cmp/article/view/3976. Acesso em: 29 apr. 2024.