Lutsak S, Basheyeva A, Asanbekov A, Voronina O. Some non-standard quasivarieties of lattices. M [Internet]. 2023 Sep. 30 [cited 2025 Oct. 30];111(3):72-80. Available from: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/584