TY  - JOUR
AU  - Dietze, Anke
AU  - Schaps, Mary
TI  - Determining Subgroups of a Given Finite Index in a Finitely Presented Group
JO  - Canadian journal of mathematics
PY  - 1974
SP  - 769
EP  - 782
VL  - 26
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-072-0/
DO  - 10.4153/CJM-1974-072-0
ID  - 10_4153_CJM_1974_072_0
ER  -