Penny-Packing and Two-Dimensional Codes. N.J.A. Sloane; R.L. Graham — 1990 Discrete & computational geometry
Dense packings of equal disks in an equilateral triangle: From 22 to 34 and beyond. Graham, R.L.; Lubachevsky, B.D. — 1995 The Electronic Journal of Combinatorics [electronic only]
Repeated patterns of dense packings of equal disks in a square. Graham, R.L.; Lubachevski, B.D. — 1996 The Electronic Journal of Combinatorics [electronic only]
Random walks on generating sets for finite groups. Chung, F.R.K.; Graham, R.L. — 1997 The Electronic Journal of Combinatorics [electronic only]