@article{VM_2000_2_3_a2,
     author = {George W. Hart},
     title = {The {Millennium} {Bookball}},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {2},
     number = {3},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VM_2000_2_3_a2/}
}