@article{Savchuk_Savchuk_Chaichenko_2019, title={Approximation of bounded holomorphic
and harmonic functions by Fejér means}, volume={71}, url={http://umj.imath.kiev.ua/index.php/umj/article/view/1455}, abstractNote={We compute the exact values of the exact upper bounds on the classes of bounded holomorphic and harmonic functions
in a unit disk for the remainders in a Voronovskaya-type formula in the case of approximation by Fej´er means. We also
present some consequences that are of independent interest.}, number={4}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={SavchukV. V. and SavchukM. V. and ChaichenkoS. O.}, year={2019}, month={Apr.}, pages={516-542} }