@article{GRSME_1999_1999_1_a23,
     author = {S\'aez de Cabez\'on Irigaray, Eduardo},
     title = {Cuadrados m\'agicos conc\'entricos.},
     journal = {La Gaceta de la Real Sociedad Matem\'atica Espa\~nola},
     pages = {561-563},
     publisher = {mathdoc},
     volume = {2},
     number = {3},
     year = {1999},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GRSME_1999_1999_1_a23/}
}