TY  - JOUR
AU  - V. I. Arnol'd
TI  - Index of a singular point of a vector field, the Petrovskii--Oleinik inequality, and mixed hodge structures
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1978
SP  - 1
EP  - 14
VL  - 12
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1978_12_1_a0/
LA  - ru
ID  - FAA_1978_12_1_a0
ER  -