%0 Journal Article
%A Thomassen, Carsten
%T The even cycle problem for directed graphs
%J Journal of the American Mathematical Society
%D 1992
%P 217-229
%V 05
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1992-1135027-1/
%R 10.1090/S0894-0347-1992-1135027-1
%F 10_1090_S0894_0347_1992_1135027_1