@article{EXMATH_1991_1991_1_a10,
     author = {Franco Fern\'andez, Leoncio},
     title = {Invariantes de {Baer} de m\'odulos cruzados.},
     journal = {Extracta mathematicae},
     pages = {35-38},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1991_1991_1_a10/}
}