@Article{         145c7c6b-1c5a-386b-8aed-805ea8afc526,
  Author        = "Birkhoff, George D.",
  date-added    = "2023-08-26 08:21:41 +0200",
  date-modified = "2023-08-26 08:21:41 +0200",
  ISSN          = "00278424",
  Journal       = "Proceedings of the National Academy of Sciences of the United States of America",
  Number        = "1",
  Pages         = "65--67",
  Publisher     = "National Academy of Sciences",
  Title         = "Note on Linear Difference and Differential Equations",
  URL           = "http://www.jstor.org/stable/87146",
  URLDate       = "2023-08-26",
  Volume        = "27",
  Year          = "1941",
  bdsk-url-1    = "http://www.jstor.org/stable/87146",
  File          = "NOTE ON LINEAR DIFFERENCE AND DIFFERENTIAL EQUATIONS - pnas.27.1.65.pdf"
}

@Article{ 145c7c6b-1c5a-386b-8aed-805ea8afc526, Author = "Birkhoff, George D.", date-added = "2023-08-26 08:21:41 +0200", date-modified = "2023-08-26 08:21:41 +0200", ISSN = "00278424", Journal = "Proceedings of the National Academy of Sciences of the United States of America", Number = "1", Pages = "65--67", Publisher = "National Academy of Sciences", Title = "Note on Linear Difference and Differential Equations", URL = "http://www.jstor.org/stable/87146", URLDate = "2023-08-26", Volume = "27", Year = "1941", bdsk-url-1 = "http://www.jstor.org/stable/87146", File = "NOTE ON LINEAR DIFFERENCE AND DIFFERENTIAL EQUATIONS - pnas.27.1.65.pdf" }