@article{Babenko_2019, title={One inequality of the Landau – Kolmogorov type for periodic functions of two variable}, volume={71}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/1428}, abstractNote={We obtain a new sharp inequality of the Landau – Kolmogorov type for a periodic function of two variables that estimates the convolution of the best uniform approximations of its partial primitives by the sums of univariate functions with the help of its $L_{\infty}$ -norm and uniform norms of its mixed primitives. Some applications of the obtained inequality are presented.}, number={2}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Babenko, V. F.}, year={2019}, month={Feb.}, pages={158-167} }