TY - JOUR AU - A. B. Gulisashvili TI - Traces of functions belonging to Sobolev and Besov spaces and extensions from subsets of Euclidean space JO - Zapiski Nauchnykh Seminarov POMI PY - 1987 SP - 137 EP - 145 VL - 157 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_1987_157_a12/ LA - ru ID - ZNSL_1987_157_a12 ER -