The Samarskii-Ionkin type problem for the fourth-order ordinary differential equation. Uzbek Mathematical Journal, [S. l.], v. 69, n. 4, p. 141–151, 2025. DOI: 10.29229/uzmj.2025-4-14. Disponível em: https://uzmj.mathinst.uz/index.php/uzmj/article/view/115.. Acesso em: 4 dec. 2025.