@Article{         10.2307/2031794,
  Author        = "Cronheim, Arno",
  date-added    = "2020-04-10 19:25:06 +0200",
  date-modified = "2020-04-10 19:25:06 +0200",
  ISSN          = "00029939, 10886826",
  Journal       = "Proceedings of the American Mathematical Society",
  Number        = "2",
  Pages         = "219--221",
  Publisher     = "American Mathematical Society",
  Title         = "A Proof of Hessenberg's Theorem",
  URL           = "http://www.jstor.org/stable/2031794",
  Volume        = "4",
  Year          = "1953",
  bdsk-url-1    = "http://www.jstor.org/stable/2031794",
  File          = "A Proof of Hessenberg's Theorem - cronheim1953 - a - r.pdf"
}

@Article{ 10.2307/2031794, Author = "Cronheim, Arno", date-added = "2020-04-10 19:25:06 +0200", date-modified = "2020-04-10 19:25:06 +0200", ISSN = "00029939, 10886826", Journal = "Proceedings of the American Mathematical Society", Number = "2", Pages = "219--221", Publisher = "American Mathematical Society", Title = "A Proof of Hessenberg's Theorem", URL = "http://www.jstor.org/stable/2031794", Volume = "4", Year = "1953", bdsk-url-1 = "http://www.jstor.org/stable/2031794", File = "A Proof of Hessenberg's Theorem - cronheim1953 - a - r.pdf" }