@article{MAIS_2015_22_1_a8,
     author = {K. Tukhliev},
     title = {On the approximation of periodic functions in $L_2$ and the values of the widths of certain classes of functions},
     journal = {Modelirovanie i analiz informacionnyh sistem},
     pages = {127--143},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAIS_2015_22_1_a8/}
}