@article{DAN_1991_318_5_a12,
     author = {V. E. Maiorov},
     title = {Integral and {Kolmogorov} widths of classes of differentiable functions},
     journal = {Doklady Akademii Nauk},
     pages = {1082--1085},
     publisher = {mathdoc},
     volume = {318},
     number = {5},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_318_5_a12/}
}