@article{GRSME_2002_2002_1_a5,
     author = {Bourguignon, Jean-Pierre.},
     title = {Un importante reto para los matem\'aticos.},
     journal = {La Gaceta de la Real Sociedad Matem\'atica Espa\~nola},
     pages = {297-309},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {2002},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GRSME_2002_2002_1_a5/}
}