@article{CMH_1968__43_139376,
     author = {Francois Fricker},
     title = {Ein {Gitterpunktproblem} im dreidiemnsionalen hyperbolischen {Raum.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {402--416},
     publisher = {mathdoc},
     volume = {43},
     year = {1968},
     zbl = {0174.08303},
     url = {http://geodesic.mathdoc.fr/item/CMH_1968__43_139376/}
}