@article{PM_1990_1990_1_a7,
     author = {Davis, Gregory J.},
     title = {Hiperbolicidad en una clase de aplicaciones 1-dimensionales.},
     journal = {Publicacions matem\`atiques},
     pages = {93-105},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1990_1990_1_a7/}
}