@article{GDZPPN000364754, title = {Disks with Special Properties of Densest Packings.}, journal = {Discrete \& computational geometry}, volume = {6}, year = {1991}, pages = {181-190}, zbl = {0731.52004}, url = {http://dml.mathdoc.fr/item/GDZPPN000364754} }
Schmitt, P. Disks with Special Properties of Densest Packings.. Discrete & computational geometry, Tome 6 (1991) pp. 181-190. http://gdmltest.u-ga.fr/item/GDZPPN000364754/