@incollection{Dachwald2017,
  author    = {Dachwald, Bernd},
  title     = {Light propulsion systems for spacecraft},
  series = {Optical nano and micro actuator technology},
  booktitle = {Optical nano and micro actuator technology},
  editor    = {Knopf, George K. and Otani, Yukitoshi},
  publisher = {CRC Press},
  address   = {Boca Raton},
  isbn      = {9781315217628 (eBook)},
  pages     = {577 -- 598},
  year      = {2017},
  language  = {en}
}
@article{Czupalla2017,
  author    = {Czupalla, Markus},
  title     = {Ein Garten im Weltraum},
  series = {Spektrum der Wissenschaft},
  journal   = {Spektrum der Wissenschaft},
  publisher = {Spektrum-der-Wiss.-Verl.-Ges.},
  address   = {Heidelberg},
  year      = {2017},
  language  = {de}
}