@article{IM2_1977_11_2_a5,
     author = {B. S. Kashin},
     title = {Diameters of some finite-dimensional sets and classes of smooth functions},
     journal = {Izvestiya. Mathematics },
     pages = {317--333},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {1977},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1977_11_2_a5/}
}