LasuriyaR. A. (2003). Characterization of the Points of $ϕ$-Strong Summability of Fourier–Laplace Series for Functions of the Class $L_p(S^m),\; p > 1$. Ukrains’kyi Matematychnyi Zhurnal, 55(1), 45-54. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/3886