%0 Journal Article
%A R.I. Bogdanov
%T Singularities of Vector Fields on the Plane With Pointed Direction.
%J Inventiones mathematicae
%D 1979
%P 247-260
%V 54
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1979__54_142681/
%F IM_1979__54_142681