@article{TM_1984_170_a13,
     author = {Yu. V. Kuznetsov},
     title = {On the question of the density of infinitely differentiable functions in {Besov} spaces},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {203--212},
     publisher = {mathdoc},
     volume = {170},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1984_170_a13/}
}