TY  - JOUR
AU  - A. V. Guminskaya
TI  - Index of zero and index at infinity for vector fields with nonnegative operators
JO  - Trudy Instituta matematiki
PY  - 2006
SP  - 44
EP  - 50
VL  - 14
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TIMB_2006_14_1_a5/
LA  - ru
ID  - TIMB_2006_14_1_a5
ER  -