TY  - JOUR
AU  - T. Head
AU  - W. Forys
TI  - Retracts of free monoids are nowhere dense with respect to finite group topologies and p-adic topologies.
JO  - Semigroup forum
PY  - 1991
SP  - 117
EP  - 120
VL  - 42
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1991__42_3_135070/
ID  - SF_1991__42_3_135070
ER  -