[1]
A. S. Serdyuk and O. I. Stepanets, “Lebesgue inequalities for poisson integrals”, Ukr. Mat. Zhurn., vol. 52, no. 6, pp. 798–808, Jun. 2000, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4474