@article{Agoshkova_2013, title={Approximation of Periodic Functions of Many Variables in Metric Spaces by Piecewise-Constant Functions}, volume={65}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/2510}, abstractNote={We prove the direct and inverse Jackson- and Bernstein-type theorems for averaged approximations of periodic functions of many variables by piecewise-constant functions with uniform partition of the period torus in metric spaces with integral metric given by a function ψ of the type of modulus of continuity.}, number={10}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Agoshkova, T. A.}, year={2013}, month={Oct.}, pages={1303–1314} }