%0 Journal Article %A S. V. Kislyakov %T A~simplified proof of a~theorem of J.~Bourgain on extension of operators %J Zapiski Nauchnykh Seminarov POMI %D 1987 %P 146-150 %V 157 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1987_157_a13/ %G ru %F ZNSL_1987_157_a13