@article{MZ_1967__96_170693,
     author = {Konrad J\"orgens},
     title = {Zur {Spektraltheorie} der {Schr\"odinger-Operatoren.}},
     journal = {Mathematische Zeitschrift},
     pages = {355--372},
     publisher = {mathdoc},
     volume = {96},
     year = {1967},
     zbl = {0163.13601},
     url = {http://geodesic.mathdoc.fr/item/MZ_1967__96_170693/}
}