@article{RRACEFN_1982_1982_1_a21,
     author = {Sarabia, Luis A.},
     title = {Una caracterizaci\'on del invariante {(X,} {G,} {A).}},
     journal = {Revista de la Real Academia de Ciencias Exactas, F{\'\i}sicas y Naturales },
     pages = {605-617},
     publisher = {mathdoc},
     volume = {76},
     number = {3},
     year = {1982},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/RRACEFN_1982_1982_1_a21/}
}