@article{WittmannUlamecRichter2005,
  author    = {Klaus Wittmann and S Ulamec and L Richter},
  title     = {Lander Systems for Planetary Missions},
  journal   = {Laboratory astrophysics and space research / ed. by P. Ehrenfreund},
  pages     = {597 -- 621},
  year      = {2005},
}