@article{WittmannUlamecFeuerbacheretal.1997,
  author    = {Wittmann, Klaus and Ulamec, S. and Feuerbacher, B. and Rosenbauer, H. (u.a.)},
  title     = {Rosetta Lander - In Situ Investigation of a Cometary Nucleus},
  series = {Lunar and Planetary Science. 28 (1997)},
  journal   = {Lunar and Planetary Science. 28 (1997)},
  isbn      = {0270-9511},
  pages     = {1461 -- 1462},
  year      = {1997},
  language  = {en}
}
@article{WittmannUlamecFeuerbacheretal.1995,
  author    = {Wittmann, Klaus and Ulamec, S. and Feuerbacher, B. and Rosenbauer, H.},
  title     = {Technical Challenge, Scientific Thrill: A Long Term Lander on an Active Comet},
  series = {Lunar and Planetary Science. 26 (1995)},
  journal   = {Lunar and Planetary Science. 26 (1995)},
  isbn      = {0270-9511},
  pages     = {1431 -- 1432},
  year      = {1995},
  language  = {en}
}
@article{WittmannFeuerbacherUlamecetal.1999,
  author    = {Wittmann, Klaus and Feuerbacher, B. and Ulamec, S. and Rosenbauer, H. (u.a.)},
  title     = {Rosetta Lander - In Situ Characterisation of a Comet Nucleus},
  series = {Acta Astronautica. 45 (1999), H. 4-9},
  journal   = {Acta Astronautica. 45 (1999), H. 4-9},
  isbn      = {0094-5765},
  pages     = {389 -- 395},
  year      = {1999},
  language  = {en}
}
@article{WittmannSchmidtFeuerbacher1988,
  author    = {Wittmann, Klaus and Schmidt, H. P. and Feuerbacher, B.},
  title     = {Microgravity research and user support in the Space Station era: The Microgravity User Support Centre},
  series = {Acta Astronautica. 17 (1988), H. 11-12},
  journal   = {Acta Astronautica. 17 (1988), H. 11-12},
  isbn      = {0094-5765},
  pages     = {1161 -- 1168},
  year      = {1988},
  language  = {en}
}