@article{MZ_1969__109_171134,
     author = {Albert Schneider},
     title = {Weitere {Untersuchungen} \"uber singul\"are reelle {S-hermitesche} {Differentialgleichungssysteme} im {Normalfall.}},
     journal = {Mathematische Zeitschrift},
     pages = {153--168},
     publisher = {mathdoc},
     volume = {109},
     year = {1969},
     zbl = {0183.36202},
     url = {http://geodesic.mathdoc.fr/item/MZ_1969__109_171134/}
}