@TechReport{Zuendorf93,
  author =    "Albert Zuendorf",
  title =     "A {H}euristic for the {S}ubgraph {I}somorphism {P}roblem in {E}xecuting {PROGRES}",
  institution = "RWTH Aachen",
  year =      "1993",
  number =    "AIB-05-1993",
  url =       "http://aib.informatik.rwth-aachen.de/1993/1993-05.ps.gz",
}