O. D. . Gabisoniya, “On the points of strong summabiity of the Fourier series ”, Ukr. Mat. Zhurn., vol. 44, no. 8, pp. 1020–1031, Sep. 1992, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/8030