TY  - JOUR
AU  - N.J.A. Sloane
AU  - R.L. Graham
TI  - Penny-Packing and Two-Dimensional Codes.
JO  - Discrete & computational geometry
PY  - 1990
SP  - 1
EP  - 12
VL  - 5
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DCG_1990__5_2_131102/
ID  - DCG_1990__5_2_131102
ER  -