@article{RMI_2006_2006_1_a22,
     author = {Fraysse, Aur\'elia and Jaffard, St\'ephane},
     title = {{\textquestiondown}C\'omo de suaves son casi todas las funciones en un espacio de {Sobolev?}},
     journal = {Revista matem\'atica iberoamericana},
     pages = {663-682},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMI_2006_2006_1_a22/}
}