%% -*-BibTeX-*-


@Article{Groetschel1980a,
  author       = "Martin Gr{\"o}tschel",
  title        = "On the symmetric travelling salesman problem: solution of a 120-city problem",
  journal      = "Mathematical Programming Study",
  volume       = "12",
  publisher    = "North-Holland",
  pages        = "61--77",
  year         = "1980",
  classmath    = "*90C10 65K05 90C09",
  language     = "English",
}