Lutsak, S., O. Voronina, and G. Nurakhmetova. “On Quasi-Identities of Finite Modular Lattices”. Journal of Mathematics, Mechanics and Computer Science 115, no. 3 (September 27, 2022): 49–57. Accessed July 22, 2024. https://bm.kaznu.kz/index.php/kaznu/article/view/1016.