%0 Journal Article %A M. Babayev %T Approximation to the Sobolev classes $W_q^r$ of functions of several variables by bilinear forms in $L_p$ for $2\le q\le p\le\infty$ %J Matematičeskie zametki %D 1997 %P 18-34 %V 62 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1997_62_1_a2/ %G ru %F MZM_1997_62_1_a2