@article{PM_2000_2000_1_a9,
     author = {Mart{\'\i}nez-Maure, Yves},
     title = {Indice de un erizo: estudio y aplicaciones.},
     journal = {Publicacions matem\`atiques},
     pages = {237-255},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {2000},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PM_2000_2000_1_a9/}
}