CHEREMNIKH, E. V. On certain resolvent convergence of one non-local problem to a problem with spectral parameter in boundary condition. Methods of Functional Analysis and Topology, [S. l.], v. 14, n. 4, p. 302–313, 2008. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/393. Acesso em: 16 dec. 2025.