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@article{TRSPY_1984_170_a13, author = {Yu. V. Kuznetsov}, title = {On the question of the density of infinitely differentiable functions in {Besov} spaces}, journal = {Informatics and Automation}, pages = {203--212}, publisher = {mathdoc}, volume = {170}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1984_170_a13/} }
Yu. V. Kuznetsov. On the question of the density of infinitely differentiable functions in Besov spaces. Informatics and Automation, Investigations in the theory of differentiable functions of many variables and its applications. Part 10, Tome 170 (1984), pp. 203-212. http://geodesic.mathdoc.fr/item/TRSPY_1984_170_a13/