%% -*-BibTeX-*- @TechReport{BoEiGrMa98b, author = "R. Bornd{\"o}rfer and A. Eisenbl{\"a}tter and M. Gr{\"o}tschel and A. Martin", title = "The Orientation Model for Frequency Assignment Problems", number = "TR 98-01", institution = "Konrad-Zuse-Zentrum f{\"u}r Informationstechnik Berlin", year = "1998", URL = "http://www.zib.de/Publications/abstracts/TR-98-01", language = "English", }