@unpublished{RothBerghoferSchirpWeberskirch1999,
  author  = {Thomas Roth-Berghofer and Werner Schirp and Frank Weberskirch},
  title   = {Using Prolog with Smalltalk-based Problem Solvers for Planning and Design Tasks},
  institution = {Fachbereich Informatik},
  series    = {LSA Report},
  number    = {97,5E},
  year    = {1999},
  url  = {http://nbn-resolving.de/urn:nbn:de:hbz:386-kluedo-547},
}