@article{PNA_2009_2009_1_a0,
     author = {Rico, Luis},
     title = {Sobre las {Nociones} de {Representaci\'on} y {Comprensi\'on} en la {Investigaci\'on} en {Educaci\'on} {Matem\'atica.}},
     journal = {PNA},
     pages = {1-14},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {2009},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/PNA_2009_2009_1_a0/}
}