@article{MZ_1958__70_169784,
     author = {P. Heinz M\"uller},
     title = {Eine neue {Methode} zur {Behandlung} nichtlinearer {Eigenwertaufgaben.}},
     journal = {Mathematische Zeitschrift},
     pages = {381--406},
     publisher = {mathdoc},
     volume = {70},
     year = {1958},
     zbl = {0083.34901},
     url = {http://geodesic.mathdoc.fr/item/MZ_1958__70_169784/}
}