%0 Journal Article
%A Friedrich Hegenbarth
%A Alberto Cavicchioli
%T On 4-manifolds with free fundamental group.
%J Forum mathematicum
%D 1994
%P 415-430
%V 6
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FORUM_1994__6_3_141746/
%F FORUM_1994__6_3_141746