@TechReport{KieselSchuerrWestfechtel92,
  author =    {N. Kiesel and A. Sch\"urr and B. Westfechtel},
  title =     "Design and {E}valuation of {GRAS}, a {G}raph-{O}riented {D}atabase {S}ystem for {E}ngineering {A}pplications",
  institution = "RWTH Aachen",
  year =      "1992",
  number =    "AIB-44-1992",
  url =       "http://aib.informatik.rwth-aachen.de/1992/1992-44.ps.gz",
}