TY - JOUR AU - V. I. Agoshkov TI - On extension with preservation of smoothness class and on existence of traces of functions in spaces used in particle transport theory JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1987 SP - 23 EP - 24 VL - 180 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1987_180_a2/ LA - ru ID - TM_1987_180_a2 ER -