YESSENBAYEVA, G.A.; SMAILOVA, A.A. On the calculation of rectangular plates by the variation method. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 82, n. 2, p. 56–62, 2016. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/100. Acesso em: 24 aug. 2025.