@article{MZ_1967__98_170751,
     author = {Joachim Weidmann},
     title = {Zur {Spektraltheorie} von {Sturm-Liouville-Operatoren.}},
     journal = {Mathematische Zeitschrift},
     pages = {268--302},
     year = {1967},
     volume = {98},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1967__98_170751/}
}