@article{MZ_1992__210_1_174420,
     author = {Urs Lang},
     title = {Quasi-minimizing surfaces in hyperbolic space.},
     journal = {Mathematische Zeitschrift},
     pages = {581--592},
     year = {1992},
     volume = {210},
     number = {1},
     zbl = {0758.53031},
     url = {http://geodesic.mathdoc.fr/item/MZ_1992__210_1_174420/}
}