Grigoryan, Tigran M., and Artavazd A. Maranjyan. “ON THE UNCONDITIONAL CONVERGENCE OF FABER-SCHAUDER SERIES IN $L^{1}$”. Proceedings of the YSU A: Physical and Mathematical Sciences 55, no. 1 (254) (May 21, 2021): 12–19. Accessed April 25, 2024. https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol55_no1_2021_pp012-019.