%0 Journal Article %A O. V. Besov %T On the density of functions with compact support in $\mathcal L_{p,\theta}^l$ and the extension of functions %J Informatics and Automation %D 1967 %P 18-30 %V 89 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1967_89_a2/ %G ru %F TRSPY_1967_89_a2