[1]
TepnadzeT. 2020. On the approximation properties of Cesàro means of negative order of double Vilenkin – Fourier series. Ukrains’kyi Matematychnyi Zhurnal. 72, 3 (Mar. 2020), 391-406. DOI:https://doi.org/10.37863/umzh.v72i3.6045.