TY  - JOUR
AU  - L. R. Volevich
TI  - On hypo-elliptic systems with variable coefficients
JO  - Doklady Akademii Nauk
PY  - 1964
SP  - 1262
EP  - 1265
VL  - 156
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1964_156_6_a2/
LA  - ru
ID  - DAN_1964_156_6_a2
ER  -