TY  - JOUR
AU  - V. M. Filippov
TI  - The variational principle for hypoelliptic equations with constant coefficients
JO  - Differencialʹnye uravneniâ
PY  - 1986
SP  - 338
EP  - 343
VL  - 22
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1986_22_2_a18/
LA  - ru
ID  - DE_1986_22_2_a18
ER  -