@ARTICLE{schaller-92,
  author = {Martin Schaller and Karl Svozil},
  title = {Partition logics of automata},
  journal = {Il Nuovo Cimento B},
  year = {1994},
  volume = {109},
  pages = {167-176},
  doi = {10.1007/BF02727427},
  url = {http://dx.doi.org/10.1007/BF02727427}
}