BabenkoV. F., KofanovV. A., & PichugovS. A. (2006). Exact inequalities for derivatives of functions of low smoothness defined on an axis and a semiaxis. Ukrains’kyi Matematychnyi Zhurnal, 58(3), 291–302. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/3454