OSTROVSKY , V. L.; SAMOILENKO, Yu. S. Application of the projectional spectral theorem to non-commutating operators families. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 40, n. 4, p. 469–481, 1988. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9182. Acesso em: 7 dec. 2025.