@article{CMUC_1978_19_1_a3,
     author = {Fisher, Brian},
     title = {Theorems on mappings satisfying a rational inequality},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {37--44},
     year = {1978},
     volume = {19},
     number = {1},
     mrnumber = {0488004},
     zbl = {0496.54038},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1978_19_1_a3/}
}