@article{CLTM_1971_1971_1_a3,
     author = {Valdivia, Manuel},
     title = {Sobre el teorema de la gr\'afica cerrada.},
     journal = {Collectanea mathematica},
     pages = {51-72},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1971},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1971_1971_1_a3/}
}