BibTeX

@ARTICLE{iumj52006,
    author = "Joachim Nitsche",
     title = "Ein Satz uber die Normalen der Niveauflachen einer Potentialfunktion",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 2,
      year = 1953,
     issue = 1,
     pages = "115--124",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj52006}{article}{
     author = {Nitsche, Joachim},
      title = {Ein Satz uber die Normalen der Niveauflachen einer Potentialfunktion},
    journal = {Indiana Univ. Math. J.},
     volume = {2},
       year = {1953},
     number = {1},
      pages = {115 \ndash 124},
}