Abu Joudeh , A. A., and G. Gát. “Almost Everywhere Convergence of Cesàro Means of Two Variable Walsh – Fourier Series With Varying Parameteres”.
Ukrains’kyi Matematychnyi Zhurnal, vol. 73, no. 3, Mar. 2021, pp. 291-07,
https://doi.org/10.37863/umzh.v73i3.196.