@article{MZ_1978__163_172752,
     author = {Volker Dietrich},
     title = {\"Uber eine notwendige und hinreichende {Bedingung} f\"ur regul\"ar singul\"ares {Verhalten} von linearen {Differentialgleichungssystemen.}},
     journal = {Mathematische Zeitschrift},
     pages = {191--198},
     publisher = {mathdoc},
     volume = {163},
     year = {1978},
     zbl = {0373.34002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__163_172752/}
}