Telyakovskii, S. A. “Estimation of the Moduli of Continuity of One-Variable Functions in the Metric of $L$ in Terms of Fourier Coefficients”. Ukrains’kyi Matematychnyi Zhurnal 46, no. 5 (May 25, 1994): 626–632. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/5723.