@article{MOMA_1970__74_177489,
     author = {H. Herold},
     title = {Nullstellen bei {L\"osungen} komplexer linearer {Differentialgleichungen} 2. {Ordnung.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {41--49},
     publisher = {mathdoc},
     volume = {74},
     year = {1970},
     zbl = {0201.10601},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1970__74_177489/}
}