@article{Akobirshoev_Shabozov_2009, title={On exact values of quasiwidths for some classes of differentiable periodic functions of two variables}, volume={61}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/3063}, abstractNote={We determine the exact values of Kolmogorov and linear quasiwidths for some classes of differentiable periodic functions of two variables in the Hilbert space $L_2(Q)$.}, number={6}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Akobirshoev, M. O. and Shabozov, M. Sh.}, year={2009}, month={Jun.}, pages={855-864} }