@misc{Priese2007,
  author    = {Lutz Priese},
  title     = {Finite automata on unranked and unordered DAGs},
  edition   = {Extended version},
  institution = {Fachbereich 4},
  series    = {Arbeitsberichte, FB Informatik},
  number    = {2007,22},
  type      = {periodicalpart},
  pages     = {19},
  year        = {2007},
}