@article{VM_2013_15_1_a1,
     author = {Paulus Gerdes},
     title = {African dance rattle capsules from {Benin,} {Nigeria} and {Congo:} {Plaiting} a symmetric, hexahedral shape},
     journal = {Visual Mathematics},
     year = {2013},
     volume = {15},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VM_2013_15_1_a1/}
}