%0 Journal Article
%A Yujiro Kawamata
%T On the length of a extremal rational curve.
%J Inventiones mathematicae
%D 1991
%P 609-612
%V 105
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1991__105_3_143926/
%F IM_1991__105_3_143926