AKHIIEZER, O.; DUNAIEVSKA, O. On eigenvalues of banded matrices. Methods of Functional Analysis and Topology, [S. l.], v. 25, n. 2, p. 98–103, 2019. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/714. Acesso em: 16 dec. 2025.