@unpublished{SonntagDenzinger1993,
  author  = {Inger Sonntag and J{\"o}rg Denzinger},
  title   = {Extending automatic theorem proving by planning},
  institution = {Fachbereich Informatik},
  series    = {SEKI Report},
  number    = {93,2},
  year    = {1993},
  url  = {http://nbn-resolving.de/urn:nbn:de:hbz:386-kluedo-3149},
}