Nagy, K. (2016) “Approximation by Norlund means of quadratical partial sums of double Walsh - Kaczmarz - Fourier series”, Ukrains’kyi Matematychnyi Zhurnal, 68(1), pp. 87-105. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/1824 (Accessed: 25April2024).