STRAUSS, V. A.; NAVARRO, L. J. Some class of real sequences having indefinite Hankel forms. Methods of Functional Analysis and Topology, [S. l.], v. 17, n. 1, p. 65–74, 2011. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/471. Acesso em: 16 dec. 2025.