@article{GRSME_2001_2001_1_a0,
     author = {Castillo, Enrique},
     title = {Construyendo modelos y resolviendo problemas con ecuaciones funcionales.},
     journal = {La Gaceta de la Real Sociedad Matem\'atica Espa\~nola},
     pages = {27-66},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {2001},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GRSME_2001_2001_1_a0/}
}