@article{05723750,
title = {Six little squares and how their numbers grow.},
journal = {Journal of Integer Sequences [electronic only]},
volume = {13},
year = {2010},
zbl = {1230.05062},
language = {en},
url = {http://dml.mathdoc.fr/item/05723750}
}
Beck, Matthias; Zaslavsky, Thomas. Six little squares and how their numbers grow.. Journal of Integer Sequences [electronic only], Tome 13 (2010) . http://gdmltest.u-ga.fr/item/05723750/