@misc{MertensVeldenKelm2006,
  author    = {Mertens, Josef and Velden, Alexander van der and Kelm, Roland},
  title     = {Flugzeug mit Fl{\"u}geln, deren maximaler Auftrieb durch steuerbare Fl{\"u}gelkomponenten ver{\"a}nderbar ist : Offenlegungsschrift DE102004045732 ; Offenlegungstag: 30.03.2006 = Aircraft with wings whose maximum lift can be altered by controllable wing components},
  publisher = {Deutsches Patent- und Markenamt},
  address   = {M{\"u}nchen},
  pages     = {6 S. : Ill.},
  year      = {2006},
  language  = {de}
}
@book{MertensVeldenKelmetal.2000,
  author    = {Mertens, Josef and Velden, Alexander van der and Kelm, Roland and Kokan, David},
  title     = {Application of MDO to large subsonic transport aircraft},
  publisher = {American Institute of Aeronautics and Astronautics},
  address   = {Reston, Va.},
  pages     = {12 S. : zahlr. Ill. u. graph. Darst.},
  year      = {2000},
  language  = {en}
}