@article{CLTM_1977_1977_1_a1,
     author = {Valdivia, Manuel},
     title = {Sobre una cierta clase de espacios topol\'ogicos.},
     journal = {Collectanea mathematica},
     pages = {9-19},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {1977},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1977_1977_1_a1/}
}