@article{VM_2000_2_4_a0,
     author = {James R. Van Dyke},
     title = {Optimal {Spherical} {Packing} of {Circles} and {Hilbert's} 14th {Problem}},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {2},
     number = {4},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VM_2000_2_4_a0/}
}