AN INITIAL BOUNDARY PROBLEM FOR A HIGHER EVEN ORDER PARTIAL DIFFERENTIAL EQUATION IN A RECTANGLE. Scientific journal of the Fergana State University, [S. l.], v. 28, n. 2, p. 42, 2023. Disponível em: https://journal.fdu.uz/index.php/sjfsu/article/view/1938. Acesso em: 8 jan. 2026.