@article{MAN_1879__14_156834,
     author = {Klein},
     title = {Ueber die {Erniedrigung} der {Modulargleichnngen.} {(Mit} 2 lithogr. {Tafeln)}},
     journal = {Mathematische Annalen},
     pages = {417--427},
     publisher = {mathdoc},
     volume = {14},
     year = {1879},
     url = {http://geodesic.mathdoc.fr/item/MAN_1879__14_156834/}
}