%0 Journal Article %A Burns, R. G. %T Finitely Generated Subgroups of HNN Groups %J Canadian journal of mathematics %D 1973 %P 1103-1112 %V 25 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-117-7/ %R 10.4153/CJM-1973-117-7 %F 10_4153_CJM_1973_117_7