%0 Journal Article
%A C.S. Hartzman
%T Separatrices and singular points. (Short Communication).
%J Aequationes mathematicae
%D 1978
%P 396-398
%V 18
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1978__18_136801/
%F AM2_1978__18_136801