@article{MAN_1922__85_158918,
     author = {H. Liebmann},
     title = {Die {Bewegungen} der hyperbolischen {Ebene}},
     journal = {Mathematische Annalen},
     pages = {172--176},
     publisher = {mathdoc},
     volume = {85},
     year = {1922},
     zbl = {48.0638.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1922__85_158918/}
}