%0 Journal Article
%A Babson, Eric
%A Kozlov, Dmitry
%T Topological obstructions to graph colorings
%J Electronic research announcements of the American Mathematical Society
%D 2003
%P 61-68
%V 09
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-03-00112-4/
%R 10.1090/S1079-6762-03-00112-4
%F ERAAMS_2003_09_a7