OSTROVSKII, V. L.; SAMOILENKO, Yu. S. On spectral theorems for families of linearly connected self-adjoint operators with given spectra associated with extended Dynkin graphs. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 11, p. 1556–1570, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3554. Acesso em: 5 dec. 2025.