RADZIEVSKII, G. V. Uniqueness of Solutions of Some Nonlocal Boundary-Value Problems for Operator-Differential Equations on a Finite Segment. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 7, p. 1006–1009, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3976. Acesso em: 6 dec. 2025.