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@TechReport{GroetschelNemhauser2007,
  author       = "Martin Gr{\"o}tschel and George L. Nemhauser",
  title        = "George Dantzig's contributions to integer programming",
  type         = "ZIB-Report",
  number       = "07-39",
  institution  = "Zuse Institute Berlin",
  year         = "2007",
  URL          = "http://opus.kobv.de/zib/volltexte/2007/1067/",
  doi:         = "10.1016/j.disopt.2007.08.003",
  language     = "English",
  seealso      = "GroetschelNemhauser2008",
}