Parasyuk О. S. Analytical continuation of expansions in Hegenbauer polynomials and its application to the investigation of the properties of the scattering amplitude. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 18, n. 4, p. 126–128, 1966. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8323. Acesso em: 14 apr. 2025.