%0 Journal Article
%A V.J. LAL
%T Wall Obstruction of a Fibration.
%J Inventiones mathematicae
%D 1968
%P 67-77
%V 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1968__6_141933/
%F IM_1968__6_141933