@article{RRACEFN_1987_1987_1_a13,
     author = {Goberna, M. A.},
     title = {Algunas propiedades de los sistemas cuyo cono caracteristico es cerrado.},
     journal = {Revista de la Real Academia de Ciencias Exactas, F{\'\i}sicas y Naturales },
     pages = {183-196},
     publisher = {mathdoc},
     volume = {81},
     number = {1},
     year = {1987},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/RRACEFN_1987_1987_1_a13/}
}