BibTeX

@ARTICLE{iumj20077,
    author = "Stefan Hildebrandt",
     title = "Unendliche Produkte von Kontraktionen",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 20,
      year = 1971,
     issue = 10,
     pages = "909--911",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj20077}{article}{
     author = {Hildebrandt, Stefan},
      title = {Unendliche Produkte von Kontraktionen},
    journal = {Indiana Univ. Math. J.},
     volume = {20},
       year = {1971},
     number = {10},
      pages = {909 \ndash 911},
}