@article{10_4064_sm_34_2_183_196,
     author = {E. M\"uller-Pfeiffer},
     title = {Spektraleigenschaften eindimensionaler {Differentialoperatoren} h\"oherer {Ordnung}},
     journal = {Studia Mathematica},
     pages = {183--196},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {1970},
     doi = {10.4064/sm-34-2-183-196},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-34-2-183-196/}
}