@article{KYB_1998_34_2_a2,
     author = {Lupi\'a\~nez, Francisco Gallego},
     title = {Finite-to-one fuzzy maps and fuzzy perfect maps},
     journal = {Kybernetika},
     pages = {163--169},
     year = {1998},
     volume = {34},
     number = {2},
     mrnumber = {1621508},
     zbl = {1274.54037},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1998_34_2_a2/}
}