Basheyeva, A.O., and S.M. Lutsak. “On Quasi-Identities of Finite Modular Lattices. II”. Bulletin of the Karaganda University. Mathematics Series 110, no. 2 (June 30, 2023): 45–52. Accessed December 8, 2025. https://mts.buketov.edu.kz/mathematics-vestnik/article/view/565.