%0 Journal Article %A Ya. Valashek %T Imbedding theorems and inequalities of various metrics for best approximations with respect to the Haar system %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1980 %P 11-15 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1980_4_a2/ %G ru %F IVM_1980_4_a2