Melibekyan, R.G. “ON QUASI-UNIVERSAL WALSH SERIES IN $L^p_{[0;1]}$, $p\in[1, 2]$”. Proceedings of the YSU A: Physical and Mathematical Sciences 50, no. 1 (239) (March 18, 2016): 22–29. Accessed November 23, 2024. https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol50_no1_2016_pp022-029.