@Unpublished{     Kracht,
  Author        = "Kracht, Markus",
  date-added    = "2013-11-04 12:46:21 +0000",
  date-modified = "2013-11-04 12:46:57 +0000",
  Keywords      = "semilinear sets",
  Title         = "A New Proof of a Theorem by Ginsburg and Spanier",
  Year          = "2002",
  File          = "A New Proof of a Theorem by Ginsburg and Spanier - Kracht (1) (0) - a - a - u.pdf"
}

@Unpublished{ Kracht, Author = "Kracht, Markus", date-added = "2013-11-04 12:46:21 +0000", date-modified = "2013-11-04 12:46:57 +0000", Keywords = "semilinear sets", Title = "A New Proof of a Theorem by Ginsburg and Spanier", Year = "2002", File = "A New Proof of a Theorem by Ginsburg and Spanier - Kracht (1) (0) - a - a - u.pdf" }