Kofanov, V. A. “Sharp Kolmogorov–Remez Type Inequalities for Periodic Funtions of a Small Smoothness”. Ukrains’kyi Matematychnyi Zhurnal 72, no. 4 (March 28, 2020): 483–493. Accessed April 7, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/963.