On the density of functions with compact support in $\mathcal L_{p,\theta}^l$ and the extension of functions
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Investigations in the theory of differentiable functions of many variables and its applications. Part 2, Tome 89 (1967), pp. 18-30
O. V. Besov. On the density of functions with compact support in $\mathcal L_{p,\theta}^l$ and the extension of functions. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Investigations in the theory of differentiable functions of many variables and its applications. Part 2, Tome 89 (1967), pp. 18-30. http://geodesic.mathdoc.fr/item/TM_1967_89_a2/
@article{TM_1967_89_a2,
     author = {O. V. Besov},
     title = {On the density of functions with compact support in $\mathcal L_{p,\theta}^l$ and the extension of functions},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {18--30},
     year = {1967},
     volume = {89},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1967_89_a2/}
}
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%D 1967
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%U http://geodesic.mathdoc.fr/item/TM_1967_89_a2/
%G ru
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