@article{GRSME_1998_1998_1_a20,
     author = {Cilleruelo, Javier},
     title = {Cuadrados m\'agicos.},
     journal = {La Gaceta de la Real Sociedad Matem\'atica Espa\~nola},
     pages = {447-451},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1998},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GRSME_1998_1998_1_a20/}
}