The completeness of the system of generalized eigenfunctions of a Bessel-type differential operator. Neliniini Kolyvannya, [S. l.], v. 25, n. 2–3, p. 242–252, 2022. Disponível em: https://nosc.imath.kiev.ua/index.php/nosc/article/view/1071. Acesso em: 12 apr. 2026.