@article{
  author = {K.-D. Kammeyer and H. Schenk},
  year = {1979},
  month = {Jan},
  title = {Ein flexibles Experimentiersystem f\"{u}r die Daten\"{u}bertragung im Fernsprechbereich (Teil I)},
  volume = {33},
  pages = {141-146},
  journal={Frequenz}
}