@article{10_4064_ap_40_3_259_270,
     author = {E. M\"uller-Pfeiffer},
     title = {Verallgemeinerungen eines {Satzes} von {Leighton} \"uber die {Oszillation} selbstadjungierter {Differentialgleichungen}},
     journal = {Annales Polonici Mathematici},
     pages = {259--270},
     publisher = {mathdoc},
     volume = {40},
     number = {3},
     year = {1981},
     doi = {10.4064/ap-40-3-259-270},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-40-3-259-270/}
}