Telyakovskii, S.A. (1994) “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(5), pp. 626–632. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5723 (Accessed: 10 April 2025).