%0 Journal Article
%A Freedman, Michael
%A Lovász, László
%A Schrijver, Alexander
%T Reflection positivity, rank connectivity, and homomorphism of graphs
%J Journal of the American Mathematical Society
%D 2007
%P 37-51
%V 20
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-06-00529-7/
%R 10.1090/S0894-0347-06-00529-7
%F 10_1090_S0894_0347_06_00529_7