@article{VM_2010_12_3_a3,
     author = {Livio Zefiro},
     title = {The compound of three octahedra and a remarkable compound of three square dipyramids, the {Escher's} solid},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/VM_2010_12_3_a3/}
}