Pachulia, N.L. (2000) “On Strong Summability of Fourier Series of Summable Functions”, Ukrains’kyi Matematychnyi Zhurnal, 52(8), pp. 1103–1111. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4514 (Accessed: 10 April 2025).