@article{PNA_2007_2007_1_a6,
     author = {Moreno, Mar{\'\i}a Francisca},
     title = {De la {Matem\'atica} {Formal} a la {Matem\'atica} {Escolar.}},
     journal = {PNA},
     pages = {99-111},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {2007},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/PNA_2007_2007_1_a6/}
}