@misc{Malcher2001,
  author    = {Andreas Malcher},
  title     = {Descriptional complexity of cellular automata and decidability questions},
  booktitle = {Frankfurter Informatik-Berichte ; Nr. 01,04},
  issn      = {1616-9107},
  institution = {Informatik},
  series    = {Frankfurter Informatik-Berichte},
  number    = {01, 4},
  type      = {workingpaper},
  pages     = {11, IV S.},
  year        = {2001},
}