@article{VM_2007_9_4_a2,
     author = {Olguin Guillermo and Castellano Lucia and Andrade Elena and Abraham Moriana and y de la Fuente Federico},
     title = {Pas {De} {Deux}},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {2007},
     url = {http://geodesic.mathdoc.fr/item/VM_2007_9_4_a2/}
}