RadzievskayaE. I., and RadzievskiiG. V. “Estimation of a <em class="a-Plus-plus">K</em>-Functional of Higher Order in Terms of a <em class="a-Plus-plus">K</Em&gt;-Functional of Lower Order”. Ukrains’kyi Matematychnyi Zhurnal 55, no. 11 (November 25, 2003): 1530-1540. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4022.