KABIDENOV, A.; KASSATOVA, A.; BEKENOV, M.; MAMYRALY, A. Properties of semigroups of elementary types of model classes. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 119, n. 3, p. 142–149, 2025. DOI: 10.31489/2025m3/142-149. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/918. Acesso em: 5 oct. 2025.