@article{WittmannUlamecRichter1999,
  author    = {Wittmann, Klaus and Ulamec, S and Richter, L},
  title     = {Lander Systems for Planetary Missions},
  series = {Laboratory astrophysics and space research / ed. by P. Ehrenfreund},
  journal   = {Laboratory astrophysics and space research / ed. by P. Ehrenfreund},
  publisher = {Kluwer},
  address   = {Dordrecht [u.a.]},
  isbn      = {0-7923-5338-2},
  pages     = {597 -- 621},
  year      = {1999},
  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}
}
@book{Wahle1999,
  author    = {Wahle, Michael},
  title     = {Angewandte Strukturanalyse. - (Dynamik)},
  publisher = {Mainz},
  address   = {Aachen},
  isbn      = {3-89653-567-6},
  pages     = {120, A41 S. : Ill., graph. Darst.},
  year      = {1999},
  language  = {de}
}
@book{Schmitz1999,
  author    = {Schmitz, G{\"u}nter},
  title     = {TransMechatronik : Entwicklung und Transfer von Entwicklungssystemen der Mechatronik / Demel, Werner ... (Hrsg.)},
  publisher = {Heinz-Nixdorf-Institut},
  address   = {Paderborn},
  pages     = {145 S. : Ill., graph. Darst.},
  year      = {1999},
  language  = {de}
}
@article{MertensKelmVelden1999,
  author    = {Mertens, Josef and Kelm, R. and Velden, A. van der},
  title     = {Interdisziplin{\"a}re Auslegung eines Verkehrsflugzeugfl{\"u}gels},
  series = {DGLR-Jahrbuch 1999 Bd. 3},
  journal   = {DGLR-Jahrbuch 1999 Bd. 3},
  pages     = {1605 -- 1610},
  year      = {1999},
  language  = {de}
}
@article{Mertens1999,
  author    = {Mertens, Josef},
  title     = {Einige herausragende Ergebnisse des Technologieprogramms "Reduktion des Aerodynamischen Widerstands (RaWid)"},
  series = {DGLR-Jahrbuch 1999 Bd. 3},
  journal   = {DGLR-Jahrbuch 1999 Bd. 3},
  pages     = {1461 -- 1468},
  year      = {1999},
  language  = {de}
}
@book{Mertens1999,
  author    = {Mertens, Josef},
  title     = {Reduktion des aerodynamischen Widerstands (RaWid) : Abschlußbericht ; Laufzeit des Vorhaben, Berichtszeitraum: 01.07.1995 bis 31.12.1998 / Verf.: J. Mertens},
  publisher = {DaimlerChrysler Aerospare Airbus GmbH},
  address   = {Hamburg},
  pages     = {31 Bl. : Ill., graph. Darst.},
  year      = {1999},
  language  = {de}
}
@book{Mertens1999,
  author    = {Mertens, Josef},
  title     = {Reduktion des aerodynamischen Widerstands (RaWid) : Abschlußbericht ; Laufzeit des Vorhaben, Berichtszeitraum: 01.07.1995 bis 31.12.1998 / Verf.: J. Mertens},
  publisher = {DaimlerChrysler Aerospare Airbus GmbH},
  address   = {Hamburg},
  pages     = {Elektronische Ressource 31 p. = 1,38 Mb. text and},
  year      = {1999},
  language  = {de}
}
@inproceedings{Mertens1999,
  author    = {Mertens, Josef},
  title     = {Some important results of the technology programme RaWid},
  series = {New Results in Numerical and Experimental Fluid Mechanics : Contributions to the 11th AG STAB/DGLR Symposium Berlin, Germany 1998. - Vol. 2. - (Notes on Numerical Fluid Mechanics ; 72)},
  booktitle = {New Results in Numerical and Experimental Fluid Mechanics : Contributions to the 11th AG STAB/DGLR Symposium Berlin, Germany 1998. - Vol. 2. - (Notes on Numerical Fluid Mechanics ; 72)},
  editor    = {Nitsche, Wolfgang},
  publisher = {Springer Fachmedien},
  address   = {Wiesbaden},
  isbn      = {978-3-663-10903-7 (Print)},
  doi       = {10.1007/978-3-663-10901-3_41},
  pages     = {315 -- 322},
  year      = {1999},
  language  = {en}
}
@book{Ley1999,
  author    = {Ley, Wilfried},
  title     = {Raumflugbetrieb : Gemeinschaftsveranstaltung der FH Aachen, der DGLR und der DLR / 12. Raumfahrt-Kolloquium an der Fachhochschule Aachen, 11. November 1999. / Ley Wilfried [Hrsg.]},
  publisher = {DGLR},
  address   = {Bonn},
  isbn      = {3-932182-07-03},
  pages     = {VIII, 215 S. : zahlr. Ill., graph. Darst.},
  year      = {1999},
  language  = {de}
}