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@article{MZM_1992_52_5_a13, author = {K. V. Runovskii}, title = {A direct theorem on approximation ``by angle'' in the spaces $L_p$, $0<p<1$}, journal = {Matemati\v{c}eskie zametki}, pages = {93--96}, publisher = {mathdoc}, volume = {52}, number = {5}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1992_52_5_a13/} }
K. V. Runovskii. A direct theorem on approximation ``by angle'' in the spaces $L_p$, $0