MALAMUD , M. M. On the formula of generalized resolvents of a non-densely defined Hermitian operator. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 12, p. 1658–1688, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8192. Acesso em: 5 dec. 2025.