%0 Journal Article
%A V. I. Arnol'd
%T Index of a singular point of a vector field, the Petrovskii--Oleinik inequality, and mixed hodge structures
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1978
%P 1-14
%V 12
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1978_12_1_a0/
%G ru
%F FAA_1978_12_1_a0