@article{PNA_2007_2007_1_a11,
     author = {Bosch, Mar{\'\i}a Asunci\'on and  Castro, Encarnaci\'on and  Segovia, Isidoro},
     title = {El {Pensamiento} {Multiplicativo} en los {Primeros} {Niveles:} una {Investigaci\'on} en {Curso.}},
     journal = {PNA},
     pages = {179-190},
     publisher = {mathdoc},
     volume = {1},
     number = {4},
     year = {2007},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/PNA_2007_2007_1_a11/}
}