ON THE BOUNDARY PROBLEM OF THE FOURTH EQUATION OF PARABOLIC- HYPERBOLIC TYPE IN PENTAGONAL DOMAIN. Scientific journal of the Fergana State University, [S. l.], n. 5, p. 2, 2023. Disponível em: https://journal.fdu.uz/index.php/sjfsu/article/view/508. Acesso em: 6 feb. 2026.