@article{PNA_2006_2006_1_a1,
     author = {Gallardo, Jes\'us and  Gonz\'alez, Jos\'e Luis},
     title = {Una {Aproximaci\'on} {Operativa} al {Diagn\'ostico} y la {Evaluaci\'on} de la {Comprensi\'on} del {Conocimiento} {Matem\'atico.}},
     journal = {PNA},
     pages = {21-31},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {2006},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/PNA_2006_2006_1_a1/}
}