BabenkoV. F., & ChurilovaM. S. (2006). Comparison of exact constants in Kolmogorov-type inequalities for periodic and nonperiodic functions of many variables. Ukrains’kyi Matematychnyi Zhurnal, 58(5), 597–606. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/3478