TY - JOUR AU - S. V. Kislyakov TI - A~simplified proof of a~theorem of J.~Bourgain on extension of operators JO - Zapiski Nauchnykh Seminarov POMI PY - 1987 SP - 146 EP - 150 VL - 157 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_1987_157_a13/ LA - ru ID - ZNSL_1987_157_a13 ER -