TY  - JOUR
AU  - I. N. Sergeev
TI  - A lower bound for the minimal exponent of a three-dimensional system
JO  - Differencialʹnye uravneniâ
PY  - 1999
SP  - 1387
EP  - 1397
VL  - 35
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1999_35_10_a11/
LA  - ru
ID  - DE_1999_35_10_a11
ER  -