@online{wiki:patchwork,
    author = {Wikipedia Deutschland},
    title = {Patchwork},
    year = 2019,
    url = {https://de.wikipedia.org/wiki/Patchwork},
    urldate = {2019-10-28}
}

@online{kpb:bedsheet,
    author = {Kite Plan Base},
    title = {Bauplan Bedsheet-Kite},
    url = {https://www.kiteplans.org/planos/bedsheet/bedsheet.html},
    urldate = {2019-10-28},
    note = {Archiv-Version von Peter Schmidts Homepage}
}


https://www.kiteplans.org/planos/bedsheet/bedsheet.html

@article{hohi:bedsheet,
  title={Bauplan \glq{}Bedsheet-Kite\grq{}},
  author={Schmidt, Peter and Allee, Wesley and Grauel, Ed},
  journal={Hoch Hinaus},
  volume={4/2002},
  year={2002},
  publisher={DCD e.V.}
}