@TechReport{Pohl96,
  author =    "Klaus Pohl",
  title =     "{PRO}-{ART}: {E}nabling {R}equirements {P}re-{T}raceability",
  institution = "RWTH Aachen",
  year =      "1996",
  number =    "AIB-04-1996",
  url =       "http://aib.informatik.rwth-aachen.de/1996/1996-04.ps.gz",
}