%0 Journal Article %A N. K. Karapetyants %T Necessary conditions for the boundedness of an operator with nonnegative quasihomogeneous kernel %J Matematičeskie zametki %D 1981 %P 787-794 %V 30 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1981_30_5_a15/ %G ru %F MZM_1981_30_5_a15