BASHEYEVA, A.O.; ZHUSSUPOVA, A.T.; NURLIBAYEV, Y.K. Bipartite Digraphs with Modular Concept Lattices of height 2. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 119, n. 3, p. 68–74, 2025. DOI: 10.31489/2025m3/68-74. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/926. Acesso em: 5 oct. 2025.