@book{OPUS4-22017,
  title     = {Workshop on Implementing Automata : WIA99 - pre-proceedings ; Potsdam, Germany, 17 - 19. July 1999},
  editor    = {Oliver Boldt and Helmut J{\"u}rgensen and L. E. Robbins},
  volume    = {1999, 4},
  year      = {1999},
}