@article{00907637,
title = {Repeated patterns of dense packings of equal disks in a square.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {3},
year = {1996},
zbl = {0851.05038},
language = {en},
url = {http://dml.mathdoc.fr/item/00907637}
}
Graham, R.L.; Lubachevski, B.D. Repeated patterns of dense packings of equal disks in a square.. The Electronic Journal of Combinatorics [electronic only], Tome 3 (1996) . http://gdmltest.u-ga.fr/item/00907637/