%0 Journal Article
%A Tetsuya Ando
%T On extremal rays of the higher dimensional varieties.
%J Inventiones mathematicae
%D 1985
%P 347-358
%V 81
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1985__81_143259/
%F IM_1985__81_143259