@TechReport{Schuerr94,
  author =    {Andy Sch\"uerr},
  title =     "Specification of {G}raph {T}ranslators with {T}riple {G}raph {G}rammars",
  institution = "RWTH Aachen",
  year =      "1994",
  number =    "AIB-12-1994",
  url =       "http://aib.informatik.rwth-aachen.de/1994/1994-12.ps.gz",
}