Babenko, V.F., Kofanov, V.A. and Pichugov, S.A. (2002) “Kolmogorov-Type Inequalities for Periodic Functions Whose First Derivatives Have Bounded Variation”, Ukrains’kyi Matematychnyi Zhurnal, 54(5), pp. 603–609. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4098 (Accessed: 6 December 2025).