YESHKEYEV, A.R.; POPOVA, N.V. Small models of convex fragments of definable subsets. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 100, n. 4, p. 160–167, 2020. DOI: 10.31489/2020m4/160-167. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/398. Acesso em: 1 nov. 2025.