%0 Journal Article
%A Karrass, A.
%A Solitar, D.
%T On a Theorem of Cohen and Lyndon About Free Bases for Normal Subgroups
%J Canadian journal of mathematics
%D 1972
%P 1086-1091
%V 24
%N 6
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-112-0/
%R 10.4153/CJM-1972-112-0
%F 10_4153_CJM_1972_112_0