@article{MAN_1893__42_157666,
     author = {R. Fricke},
     title = {Zur gruppentheoretischen {Grundlegung} der automorphen {Functionen}},
     journal = {Mathematische Annalen},
     pages = {564--594},
     publisher = {mathdoc},
     volume = {42},
     year = {1893},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1893__42_157666/}
}