YESHKEYEV, A.; YARULLINA, A.; KASSYMETOVA, M. JONSSON EXISTENTIALLY CLOSED UNARS OF EXPANDED SIGNATURE. Bulletin of Abai KazNPU. Series of Physical and mathematical sciences, Алматы, Казахстан, v. 87, n. 3, p. 17–26, 2024. DOI: 10.51889/2959-5894.2024.87.3.002. Disponível em: https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/2053. Acesso em: 3 dec. 2024.