@unpublished{LundeWirth1994,
  author  = {R{\"u}diger Lunde and Claus-Peter Wirth},
  title   = {ASF+ eine ASF - {\"a}hnliche Spezifikationssprache},
  institution = {Fachbereich Informatik},
  series    = {SEKI Report Working Papers},
  number    = {1994,5},
  year    = {1994},
}