@article{TM_2016_294_a19,
     author = {A. A. Vasil'eva},
     title = {Estimates for the widths of discrete function classes generated by a~two-weight summation operator},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {308--324},
     publisher = {mathdoc},
     volume = {294},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2016_294_a19/}
}