%0 Journal Article
%A Masataka Tomari
%A Fumio Hidaka
%T On singularities arising from the contraction of the minimal section a a ruled surface.
%J Manuscripta mathematica
%D 1989
%P 329-348
%V 65
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MM2_1989__65_3_155443/
%F MM2_1989__65_3_155443