%0 Journal Article
%A Yujiro Kawamata
%T Small contractions of four dimensional algebraic manifolds.
%J Mathematische Annalen
%D 1989
%P 595-600
%V 284
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1989__284_4_164574/
%F MAN_1989__284_4_164574