@book{FiedlerWollert1993,
  author    = {Fiedler, J{\"o}rg and Wollert, J{\"o}rg},
  title     = {C f{\"u}r die Automatisierungspraxis : Grundlagen, Algorithmen, Beispiele},
  publisher = {D{\"u}sseldorf},
  address   = {VDI-Verl.},
  isbn      = {3-18-401320-0},
  pages     = {VIII, 278 S.},
  year      = {1993},
  language  = {de}
}
@book{WollertFiedler1995,
  author    = {Wollert, J{\"o}rg and Fiedler, J{\"o}rg},
  title     = {Automatisieren mit dem PC : Hardware, Software, Realisierung},
  publisher = {VDI-Verl.},
  address   = {D{\"u}sseldorf},
  isbn      = {3-18-401318-9},
  pages     = {VIII, 293 S.},
  year      = {1995},
  language  = {de}
}
@book{WollertFiedler1998,
  author    = {Wollert, J{\"o}rg and Fiedler, J{\"o}rg},
  title     = {Automatisieren mit dem PC. - 2. Aufl.},
  edition   = {2. Aufl.},
  publisher = {Springer},
  address   = {Berlin [u.a.]},
  isbn      = {3-540-63271-9},
  pages     = {IX, 343 S.},
  year      = {1998},
  language  = {de}
}