%0 Journal Article
%A Claus Michael Ringel
%T Hall algebras and quantum groups.
%J Inventiones mathematicae
%D 1990
%P 583-592
%V 101
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1990__101_2_143817/
%F IM_1990__101_2_143817