TY  - JOUR
AU  - Mohammad I. Khanfar
TI  - Lengths In Semi-Free Groups.
JO  - Revista colombiana de matematicas
PY  - 1988
SP  - 67
EP  - 76
VL  - 22
IS  - 1-4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RCM_1988__22_1-4_181809/
ID  - RCM_1988__22_1-4_181809
ER  -