%0 Journal Article
%A Alon, Noga
%A Seymour, Paul
%A Thomas, Robin
%T A separator theorem for nonplanar graphs
%J Journal of the American Mathematical Society
%D 1990
%P 801-808
%V 03
%N 4
%U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1990-1065053-0/
%R 10.1090/S0894-0347-1990-1065053-0
%F 10_1090_S0894_0347_1990_1065053_0