Yeshkeyev, A.R., M.T. Omarova, and G.E. Zhumabekova. “The J-Minimal Sets in the Hereditary Theories”. Bulletin of the Karaganda University. Mathematics Series 94, no. 2 (June 28, 2019): 92–98. Accessed August 18, 2025. http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/304.