Т. Тепнадзе. 2021. “Ces`aro Means of Negative Order of the One-Dimensional Vilenkin-Fourier Series”. BULLETIN OF THE L.N. GUMILYOV EURASIAN NATIONAL UNIVERSITY. Mathematics. Computer Science. Mechanics Series 135 (2):6-11. https://doi.org/10.32523/bulmathenu.2021/2.1.