@article{IM2_2009_73_2_a3,
     author = {Yu. V. Malykhin},
     title = {Widths related to pseudo-dimension},
     journal = {Izvestiya. Mathematics },
     pages = {319--332},
     publisher = {mathdoc},
     volume = {73},
     number = {2},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2009_73_2_a3/}
}