@article{AIF_2000__50_1_197_0,
     author = {Oeljeklaus, Eberhard and Schmerling, Christina},
     title = {Hyperbolicity properties of quotient surfaces by freely operating arithmetic lattices},
     journal = {Annales de l'Institut Fourier},
     pages = {197--210},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {50},
     number = {1},
     year = {2000},
     doi = {10.5802/aif.1751},
     mrnumber = {2001j:32021},
     zbl = {0952.32015},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/aif.1751/}
}