Babenko, V. F., and O. V. Kovalenko. “On the Dependence of the Norm of a Function on the Norms of Its Derivatives of Orders $k$ , $r - 2$ and $r , 0 < K &lt; R - 2$”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 64, no. 5, May 2012, pp. 597-03, https://umj.imath.kiev.ua/index.php/umj/article/view/2600.