@article{PNA_2008_2008_1_a11,
     author = {de Castro, Carlos and  Castro, Enrique and  Segovia, Isidoro},
     title = {Errores en el {Ajuste} del {Valor} {Posicional} en {Tareas} de {Estimaci\'on:} un {Estudio} con {Maestros} en {Formaci\'on.}},
     journal = {PNA},
     pages = {191-205},
     publisher = {mathdoc},
     volume = {2},
     number = {4},
     year = {2008},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/PNA_2008_2008_1_a11/}
}