DUDKIN, M. E. An exact inner structure of the block Jacobi-type unitary matrices connected with the corresponding direct and inverse spectral problems. Methods of Functional Analysis and Topology, [S. l.], v. 14, n. 2, p. 168–176, 2008. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/380. Acesso em: 17 dec. 2025.