%0 Journal Article
%A T. Head
%A W. Forys
%T Retracts of free monoids are nowhere dense with respect to finite group topologies and p-adic topologies.
%J Semigroup forum
%D 1991
%P 117-120
%V 42
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1991__42_3_135070/
%F SF_1991__42_3_135070