TY - JOUR AU - Yu. A. Brudnyi AU - P. A. Shvartsman TI - Extension of functions with preservation of smoothness JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1987 SP - 60 EP - 61 VL - 180 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1987_180_a28/ LA - ru ID - TM_1987_180_a28 ER -