TY  - JOUR
AU  - John Dollhopf
AU  - Ian Goulden
AU  - Curtis Greene
TI  - Words avoiding a reflexive acyclic relation
JO  - The electronic journal of combinatorics
PY  - 2004
VL  - 11
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.37236/1885/
DO  - 10.37236/1885
ID  - 10_37236_1885
ER  -