@article{MAN_1958__135_160611,
     author = {M. Koecher},
     title = {Die {Geod\"atischen} von {Positivit\"atsbereichen.}},
     journal = {Mathematische Annalen},
     pages = {192--202},
     publisher = {mathdoc},
     volume = {135},
     year = {1958},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1958__135_160611/}
}