@article{MZ_1963__82_170180,
     author = {H. Leptin},
     title = {Kamkesche {Eigenwertprobleme} und {Hilbert-Schmidt-Operatoren.}},
     journal = {Mathematische Zeitschrift},
     pages = {133--151},
     publisher = {mathdoc},
     volume = {82},
     year = {1963},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1963__82_170180/}
}