On Block Matrices Associated with Discrete Trigonometric Transforms and Their Use in the Theory of Wave Propagation . Journal of Computational Mathematics, [S. l.], v. 28, n. 6, p. 864–878, 2021. DOI: 10.4208/jcm.1004-m3193. Disponível em: https://www.global-sci.com/index.php/JCM/article/view/12016. Acesso em: 5 dec. 2025.