TY  - JOUR
AU  - A. F. Andreev
TI  - The exceptional direction of an $n$th order system at a stationary point
JO  - Differencialʹnye uravneniâ
PY  - 1974
SP  - 187
EP  - 194
VL  - 10
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1974_10_2_a0/
LA  - ru
ID  - DE_1974_10_2_a0
ER  -