Gorodetskyi, V., Martynyuk, O. і Kolisnyk, R. (1) A nonlocal multipoint problem for a differential operator equation of second order, Буковинський математичний журнал, 3(2). Available at: https://bmj.fmi.org.ua/index.php/adm/article/view/134 (Accessed: 3Травень2024).