@article{RCM_1991__25_1-4_181851,
     author = {Diego Mejia and David Minda},
     title = {Hyperbolic geometry in hyperbolically k-convex regions},
     journal = {Revista colombiana de matematicas},
     pages = {123--142},
     publisher = {mathdoc},
     volume = {25},
     number = {1-4},
     year = {1991},
     zbl = {0784.53006},
     url = {http://geodesic.mathdoc.fr/item/RCM_1991__25_1-4_181851/}
}