@book{kutrib_gießen_1998, 
  title={On stack-augmented polyautomata}, 
  DOI={10.22029/jlupub-1981}, 
  abstractNote={A stack augmented generalization of cellular automata, the pushdown cellular automata, are investigated. We are studying the language accepting capabilities of such devices. Closure properties of real­time, linear­time and unrestricted time language families are shown. The relationships of these families with each other and to languages of sequential automata are considered.}, 
  institution={Universitätsbibliothek Gießen}, 
  author={Kutrib, Martin and Gießen}, 
  year={1998}, 
  month={May}
  }