HATAMLEH, R.; ZOLOTAREV, V. A. Jacobi operators and orthonormal matrix-valued polynomials. I. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 69, n. 2, p. 228–239, 2017. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1688. Acesso em: 14 apr. 2025.