YESHKEYEV, A.R.; Issaeva А.К.; POPOVA, N.V. Сore Jonsson theories. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 97, n. 1, p. 104–110, 2020. DOI: 10.31489/2020m1/104-110. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/327. Acesso em: 27 aug. 2025.