@article{EXMA_2006__15_3_232416,
     author = {Stillinger, F.H. and Torquato, S.},
     title = {New conjectural lower bounds on the optimal density of sphere packings.},
     journal = {Experimental mathematics},
     pages = {307--331},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {2006},
     zbl = {1113.52034},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMA_2006__15_3_232416/}
}