@article{MZ_1942__48_169000,
     author = {O. Perron},
     title = {Einige {Bemerkungen} \"uber rationale {Fl\"achen}},
     journal = {Mathematische Zeitschrift},
     pages = {467--496},
     publisher = {mathdoc},
     volume = {48},
     year = {1942},
     zbl = {0027.24704},
     url = {http://geodesic.mathdoc.fr/item/MZ_1942__48_169000/}
}