@article{MAN_1907__64_158307,
     author = {G. Prasad},
     title = {\"Uber eine {Klasse} von nichtanalytischen {Fl\"achen} konstanter positiver {Gau{\ss}scher} {Kr\"ummung}},
     journal = {Mathematische Annalen},
     pages = {136--141},
     publisher = {mathdoc},
     volume = {64},
     year = {1907},
     zbl = {38.0636.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1907__64_158307/}
}