TY  - JOUR
AU  - Yu. Yu. Berest
TI  - Weak invariants of local groups of transformations
JO  - Differencialʹnye uravneniâ
PY  - 1993
SP  - 1796
EP  - 1803
VL  - 29
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1993_29_10_a14/
LA  - ru
ID  - DE_1993_29_10_a14
ER  -