@article{MAN_1956__132_160516,
     author = {K. Leichtweiss},
     title = {Das {Problem} von {Cauchy} in der mehrdimensionalen {Differentialgeometrie.} {III.} {Nat\"urliche} {Gleichungen.}},
     journal = {Mathematische Annalen},
     pages = {201--245},
     publisher = {mathdoc},
     volume = {132},
     year = {1956},
     zbl = {0072.16901},
     url = {http://geodesic.mathdoc.fr/item/MAN_1956__132_160516/}
}