LASURIYA, R. A. Approximation of Functions on the Sphere by Linear Methods. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 66, n. 11, p. 1498–1511, 2014. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2241. Acesso em: 5 dec. 2025.