TY  - JOUR
AU  - Daniel W. Cranston
AU  - Gexin Yu
TI  - A new lower bound on the density of vertex identifying codes for the infinite hexagonal grid
JO  - The electronic journal of combinatorics
PY  - 2009
VL  - 16
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.37236/202/
DO  - 10.37236/202
ID  - 10_37236_202
ER  -