@article{GRSME_2006_2006_1_a5,
     author = {Duval, Raymond},
     title = {Un tema crucial en la educaci\'on matem\'atica: la habilidad para cambiar el registro de representaci\'on.},
     journal = {La Gaceta de la Real Sociedad Matem\'atica Espa\~nola},
     pages = {143-168},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {2006},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GRSME_2006_2006_1_a5/}
}