%0 Journal Article
%A Calegari, Danny
%T Stable commutator length is rational in free groups
%J Journal of the American Mathematical Society
%D 2009
%P 941-961
%V 22
%N 4
%U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-09-00634-1/
%R 10.1090/S0894-0347-09-00634-1
%F 10_1090_S0894_0347_09_00634_1