@article{DCG_1991__6_4_131153,
     author = {P. Schmitt},
     title = {Disks with {Special} {Properties} of {Densest} {Packings.}},
     journal = {Discrete & computational geometry},
     pages = {181--190},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {1991},
     zbl = {0731.52004},
     url = {http://geodesic.mathdoc.fr/item/DCG_1991__6_4_131153/}
}