@article{Koehn2000,
  author    = {K{\"o}hn, Tilo},
  title     = {OCR : Texterkennungssoftware},
  year      = {2000},
  language  = {de}
}
@article{Koehn2000,
  author    = {K{\"o}hn, Tilo},
  title     = {{\"U}berlegungen zur Herstellung einer CD-ROM mit dem Autorensystem Macromedia Director},
  year      = {2000},
  language  = {de}
}
@misc{Koehn1999,
  author    = {K{\"o}hn, Tilo},
  title     = {Quellensammlung zur mittelalterlichen Geschichte : Fontes medii aevi (CD-ROM); Berlin, Bogon [u.a.], 1998},
  year      = {1999},
  language  = {de}
}