@article{RMI_2007_2007_1_a2,
     author = {Elduque, A.},
     title = {The {Magic} {Square} and {Symmetric} {Compositions} {II.}},
     journal = {Revista matem\'atica iberoamericana},
     pages = {57-84},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMI_2007_2007_1_a2/}
}