ABDULLAYEV, F. G.; KÜÇÜKASLAN, M. On the Convergence of Fourier Series with Orthogonal Polynomials inside and on the Closure of a Region. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 54, n. 10, p. 1299–1312, 2002. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4169. Acesso em: 5 dec. 2025.