RAIKOV, Georgi. Spectral Shift Function for Schr¨odinger Operators in Constant Magnetic Fields. CUBO, A Mathematical Journal, [S. l.], v. 7, n. 2, p. 171–199, 2005. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1548. Acesso em: 28 jan. 2026.