%0 Journal Article
%A Mohammad I. Khanfar
%T Lengths In Semi-Free Groups.
%J Revista colombiana de matematicas
%D 1988
%P 67-76
%V 22
%N 1-4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RCM_1988__22_1-4_181809/
%F RCM_1988__22_1-4_181809