@article{RCM_1992__26_1-4_181858,
     author = {Ivan Kupka},
     title = {A {Banach} fixed point theorem for topolocical spaces},
     journal = {Revista colombiana de matematicas},
     pages = {97--102},
     publisher = {mathdoc},
     volume = {26},
     number = {1-4},
     year = {1992},
     url = {http://geodesic.mathdoc.fr/item/RCM_1992__26_1-4_181858/}
}