@article{VM_2003_5_3_a2,
     author = {Izidor Hafner and Tomislav Zitko},
     title = {Projections of the world onto convex polyhedra},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {5},
     number = {3},
     year = {2003},
     url = {http://geodesic.mathdoc.fr/item/VM_2003_5_3_a2/}
}