YESHKEYEV, A.R.; KASYMETOVA, M.T. Properties of lattices of the existential formulas of Jonsson fragments. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 79, n. 3, p. 25–32, 2015. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/43. Acesso em: 10 jul. 2025.