TY  - JOUR
AU  - V. I. Burenkov
TI  - On the extension of functions with preservation and with deterioration of the differential properties
JO  - Doklady Akademii Nauk
PY  - 1975
SP  - 269
EP  - 272
VL  - 224
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1975_224_2_a3/
LA  - ru
ID  - DAN_1975_224_2_a3
ER  -