@article{CMH_1984__59_251488,
     author = {Peter Thurnheer},
     title = {Zu einem hyperbolischen {Gitterpunktproblem} {(Berichtigung,} {Zusatz).}},
     journal = {Commentarii mathematici Helvetici},
     pages = {313--318},
     publisher = {mathdoc},
     volume = {59},
     year = {1984},
     zbl = {0537.10029},
     url = {http://geodesic.mathdoc.fr/item/CMH_1984__59_251488/}
}