@article{SM_1993_74_1_a9,
     author = {V. A. Medvedev},
     title = {On the representation of functions as a~sum of several compositions},
     journal = {Sbornik. Mathematics},
     pages = {119--130},
     publisher = {mathdoc},
     volume = {74},
     number = {1},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1993_74_1_a9/}
}