%0 Journal Article
%A Karrass, A.
%A Solitar, D.
%T Subgroups of HNN Groups and Groups with one Defining Relation
%J Canadian journal of mathematics
%D 1971
%P 627-643
%V 23
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-070-x/
%R 10.4153/CJM-1971-070-x
%F 10_4153_CJM_1971_070_x