BOROGOVAC,M. . Reducibility of self-adjoint linear relations and application to generalized Nevanlinna functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 7, p. 893–920, 2022. DOI: 10.37863/umzh.v74i7.6084. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6084. Acesso em: 5 dec. 2025.