TY  - JOUR
AU  - V. S. Vladimirov
AU  - V. V. Zharinov
TI  - Closed forms associated with linear differential operators
JO  - Differencialʹnye uravneniâ
PY  - 1980
SP  - 845
EP  - 867
VL  - 16
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1980_16_5_a5/
LA  - ru
ID  - DE_1980_16_5_a5
ER  -