@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/