%0 Journal Article
%A N.J.A. Sloane
%A R.L. Graham
%T Penny-Packing and Two-Dimensional Codes.
%J Discrete & computational geometry
%D 1990
%P 1-12
%V 5
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DCG_1990__5_2_131102/
%F DCG_1990__5_2_131102