@TechReport{KuchenLueckingStoltze91,
  author =    {Herbert Kuchen and Friedrich L\"ucking and Holger Stoltze},
  title =     "The {T}opology {D}escription {L}anguage {TDL}",
  institution = "RWTH Aachen",
  year =      "1991",
  number =    "AIB-22-1991",
  url =       "http://aib.informatik.rwth-aachen.de/1991/1991-22.ps.gz",
}