TY  - JOUR
AU  - A.H.M. Hoare
TI  - Nielsen methods in groups with a length function.
JO  - Mathematica Scandinavica
PY  - 1981
SP  - 153
EP  - 164
VL  - 48
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1981__48_166746/
ID  - MS2_1981__48_166746
ER  -