Melibekyan, R. (2016). ON QUASI-UNIVERSAL WALSH SERIES IN $L^p_{[0;1]}$, $p\in[1, 2]$. Proceedings of the YSU A: Physical and Mathematical Sciences, 50(1 (239), 22–29. https://doi.org/10.46991/PSYU:A/2016.50.1.022