TY  - JOUR
AU  - P. G. Lasy
TI  - On the theory of stability in the first approximation of completely integrable Pfaffian systems
JO  - Differencialʹnye uravneniâ
PY  - 1983
SP  - 529
EP  - 532
VL  - 19
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1983_19_3_a20/
LA  - ru
ID  - DE_1983_19_3_a20
ER  -