SAMOILENKO, V. G. On Some Spectral Properties of the Energy Operator for an Infinite System in a Magnetic Field. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 56, n. 2, p. 284–289, 2004. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3753. Acesso em: 14 apr. 2025.