%0 Journal Article
%A Kyungyong Lee
%A Ralf Schiffler
%T Positivity for cluster algebras
%J Annals of mathematics
%D 2015
%P 73-125
%V 182
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4007/annals.2015.182.1.2/
%R 10.4007/annals.2015.182.1.2
%G en
%F 10_4007_annals_2015_182_1_2