@article{GAMA_1967_1967_1_a3,
     author = {Casanova Gonz\'alez-Mateo, Jes\'us},
     title = {Extensi\'on del concepto de diferenciabilidad.},
     journal = {Gaceta matem\'atica},
     pages = {63-84},
     year = {1967},
     volume = {19},
     number = {3-4},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1967_1967_1_a3/}
}