@article{NGWGMP_1900__1900_58481,
     author = {Robert Fricke},
     title = {Die automorphen {Elementarformen}},
     journal = {Nachrichten von der Gesellschaft der Wissenschaften zu G\"ottingen, Mathematisch-Physikalische Klasse},
     pages = {303--313},
     publisher = {mathdoc},
     volume = {1900},
     year = {1900},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/NGWGMP_1900__1900_58481/}
}