GAVRILYUK, I. P.; MAKAROV, V. L. Resonant equations with classical orthogonal polynomials. II. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 4, p. 455–470, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1451. Acesso em: 5 dec. 2025.