@article{10_21136_CMJ_1976_101419,
     author = {M\"uller-Pfeiffer, Erich},
     title = {\"Uber {Verallgemeinerungen} des {Virialsatzes} und {Existenzfragen} von {Eigenwerten} bei {Schr\"odingeroperatoren}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {458--469},
     year = {1976},
     volume = {26},
     number = {3},
     doi = {10.21136/CMJ.1976.101419},
     mrnumber = {0442507},
     zbl = {0345.35031},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1976.101419/}
}