@article{CLTM_1982_1982_1_a17,
     author = {Brunner, Norbert},
     title = {Nota sobre la propiedad diferencial.},
     journal = {Collectanea mathematica},
     pages = {221-223},
     publisher = {mathdoc},
     volume = {33},
     number = {3},
     year = {1982},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1982_1982_1_a17/}
}