TY  - JOUR
AU  - Neumann, B. H.
TI  - On a Conjecture of Hanna Neumann
JO  - Glasgow mathematical journal
PY  - 1956
SP  - 13
EP  - 17
VL  - 2
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S2040618500033384/
DO  - 10.1017/S2040618500033384
ID  - 10_1017_S2040618500033384
ER  -