@article{GDZPPN002083221,
title = {Densest Packing of Six Equal Circles in a Square.},
journal = {Elemente der Mathematik},
volume = {49},
year = {1994},
pages = {27-31},
zbl = {0807.52013},
url = {http://dml.mathdoc.fr/item/GDZPPN002083221}
}
Melissen, Hans. Densest Packing of Six Equal Circles in a Square.. Elemente der Mathematik, Tome 49 (1994) pp. 27-31. http://gdmltest.u-ga.fr/item/GDZPPN002083221/