MURADOV, F.Kh. Ternary semigroups of topological transformations. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 102, n. 2, p. 84–91, 2021. DOI: 10.31489/2021m2/84-91. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/419. Acesso em: 6 oct. 2025.