R. A. Lasuriya, “Summation of Fourier-Laplace Series in the Space $L(S^m)$”, Ukr. Mat. Zhurn., vol. 57, no. 4, pp. 496–504, Apr. 2005, Accessed: Feb. 16, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3616