TY  - JOUR
AU  - Burns, R. G.
TI  - Finitely Generated Subgroups of HNN Groups
JO  - Canadian journal of mathematics
PY  - 1973
SP  - 1103
EP  - 1112
VL  - 25
IS  - 5
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-117-7/
DO  - 10.4153/CJM-1973-117-7
ID  - 10_4153_CJM_1973_117_7
ER  -