✓

@Book{            book:3841,
  Author        = "van der Put, Marius and Singer, Michael F.",
  date-added    = "2022-04-12 15:47:18 +0200",
  date-modified = "2022-04-12 15:47:18 +0200",
  Edition       = "1",
  ISBN          = "9783540632436,3540632433",
  Publisher     = "Springer-Verlag Berlin Heidelberg",
  Series        = "Lecture Notes in Mathematics 1666",
  Title         = "Galois Theory of Difference Equations",
  URL           = "http://gen.lib.rus.ec/book/index.php?md5=7b3930a5ce31df0039e332eedcb063f0",
  Year          = "1997",
  bdsk-url-1    = "http://gen.lib.rus.ec/book/index.php?md5=7b3930a5ce31df0039e332eedcb063f0",
  File          = "Galois Theory of Difference Equations - Put-Singer1997\_Book\_GaloisTheoryOfDifferenceEquati.pdf",
  file-2        = "Galois Theory of Difference Equations (Marius van der Put, Michael F. Singer (auth.)) (z-lib.org).pdf"
}

@Book{ book:3841, Author = "van der Put, Marius and Singer, Michael F.", date-added = "2022-04-12 15:47:18 +0200", date-modified = "2022-04-12 15:47:18 +0200", Edition = "1", ISBN = "9783540632436,3540632433", Publisher = "Springer-Verlag Berlin Heidelberg", Series = "Lecture Notes in Mathematics 1666", Title = "Galois Theory of Difference Equations", URL = "http://gen.lib.rus.ec/book/index.php?md5=7b3930a5ce31df0039e332eedcb063f0", Year = "1997", bdsk-url-1 = "http://gen.lib.rus.ec/book/index.php?md5=7b3930a5ce31df0039e332eedcb063f0", File = "Galois Theory of Difference Equations - Put-Singer1997_Book_GaloisTheoryOfDifferenceEquati.pdf", file-2 = "Galois Theory of Difference Equations (Marius van der Put, Michael F. Singer (auth.)) (z-lib.org).pdf" }