@article{KYB_1999_35_2_a4,
     author = {Lupia\~nez, Francisco Gallego},
     title = {Proto-metrizable fuzzy topological spaces},
     journal = {Kybernetika},
     pages = {209--213},
     year = {1999},
     volume = {35},
     number = {2},
     mrnumber = {1690946},
     zbl = {1274.54036},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1999_35_2_a4/}
}