TY  - JOUR
AU  - È. I. Grudo
TI  - Analogues of the fundamental theorems of the first method of Ljapunov for Pfaffian systems
JO  - Differencialʹnye uravneniâ
PY  - 1979
SP  - 589
EP  - 599
VL  - 15
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1979_15_4_a1/
LA  - ru
ID  - DE_1979_15_4_a1
ER  -