MOGILEVSKII, V. I. Spectral and pseudospectral functions of Hamiltonian systems: development of the results by Arov-Dym and Sakhnovich. Methods of Functional Analysis and Topology, [S. l.], v. 21, n. 4, p. 370–402, 2015. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/624. Acesso em: 16 dec. 2025.