LASURIYA, R. A. (ϕ, α)-Strong Summability of Fourier–Laplace Series for Functions Continuous on a Sphere. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 54, n. 5, p. 656–665, 2002. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4104. Acesso em: 6 dec. 2025.