%0 Journal Article
%A M. Babayev
%T On the degree of approximation of the Sobolev class $W_q^r$ by bilinear forms in $L_p$ for $1\leqslant q\leqslant p\leqslant 2$
%J Sbornik. Mathematics
%D 1992
%P 113-120
%V 72
%N 1
%U http://geodesic.mathdoc.fr/item/SM_1992_72_1_a5/
%G en
%F SM_1992_72_1_a5