PETRINA, D. Ya. Spectrum and States of the BCS Hamiltonian in a Finite Domain. III. BCS Hamiltonian with Mean-Field Interaction. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 54, n. 11, p. 1486–1505, 2002. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4187. Acesso em: 5 dec. 2025.