@article{MZ_1952__57_169317,
     author = {Kurt Leichtweiss},
     title = {Nat\"urliche {Gleichungen} einer {Fl\"ache.}},
     journal = {Mathematische Zeitschrift},
     pages = {244--264},
     publisher = {mathdoc},
     volume = {57},
     year = {1952},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1952__57_169317/}
}