@article{SchneiderSchneider2009,
  author    = {Schneider, Bettina and Schneider, Wilhelm},
  title     = {Die Jahresabschlussanalyse},
  series = {Das Wirtschaftsstudium : wisu ; Zeitschrift f{\"u}r Ausbildung, Examen, Berufseinstieg und Fortbildung. 38 (2009), H. 12},
  journal   = {Das Wirtschaftsstudium : wisu ; Zeitschrift f{\"u}r Ausbildung, Examen, Berufseinstieg und Fortbildung. 38 (2009), H. 12},
  publisher = {Lange},
  address   = {D{\"u}sseldorf},
  isbn      = {0340-3084},
  pages     = {1594 -- 1600},
  year      = {2009},
  language  = {de}
}
@article{Tietze2009,
  author    = {Tietze, J{\"u}rgen},
  title     = {Die Elastizit{\"a}t {\"o}konomischer Funktionen},
  series = {Das Wirtschaftsstudium : Wisu. 38 (2009), H. 8/9},
  journal   = {Das Wirtschaftsstudium : Wisu. 38 (2009), H. 8/9},
  publisher = {Lange},
  address   = {D{\"u}sseldorf},
  isbn      = {0340-3084},
  pages     = {1179 -- 1187},
  year      = {2009},
  language  = {de}
}
@inproceedings{DachwaldWurm2009,
  author    = {Dachwald, Bernd and Wurm, P.},
  title     = {Design concept and modeling of an advanced solar photon thruster},
  series = {Advances in the Astronautical Sciences},
  booktitle = {Advances in the Astronautical Sciences},
  publisher = {American Astronautical Society},
  address   = {San Diego, Calif.},
  isbn      = {978-087703554-1},
  issn      = {00653438},
  pages     = {723 -- 740},
  year      = {2009},
  abstract  = {The so-called "compound solar sail", also known as "Solar Photon Thruster" (SPT), holds the potential of providing significant performance advantages over the flat solar sail. Previous SPT design concepts, however, do not consider shadowing effects and multiple reflections of highly concentrated solar radiation that would inevitably destroy the gossamer sail film. In this paper, we propose a novel advanced SPT (ASPT) design concept that does not suffer from these oversimplifications. We present the equations that describe the thrust force acting on such a sail system and compare its performance with respect to the conventional flat solar sail.},
  language  = {en}
}
@article{SchoeningSchuetz2009,
  author    = {Sch{\"o}ning, Michael Josef and Sch{\"u}tz, S.},
  title     = {Der K{\"a}fer/Chip-Sensor als bioelektronischer "Schn{\"u}ffler"},
  series = {Bioanalytik f{\"u}r Einsteiger : [Diabetes, Drogen und DNA] / Reinhard Renneberg. Darja S{\"u}ßbier (Ill.). [Red.: Andreas Held ...]},
  journal   = {Bioanalytik f{\"u}r Einsteiger : [Diabetes, Drogen und DNA] / Reinhard Renneberg. Darja S{\"u}ßbier (Ill.). [Red.: Andreas Held ...]},
  publisher = {Spektrum, Akad. Verl.},
  address   = {Heidelberg},
  isbn      = {978-3-8274-1831-9},
  pages     = {204 -- 205},
  year      = {2009},
  language  = {de}
}
@article{DoeringFeldmannKuhnhenne2009,
  author    = {D{\"o}ring, Bernd and Feldmann, Markus and Kuhnhenne, Markus},
  title     = {Der Beitrag von Profilblechdecken zur passiven K{\"u}hlung},
  series = {Bauphysik},
  volume    = {Vol. 31},
  journal   = {Bauphysik},
  number    = {Iss. 2},
  publisher = {Wiley},
  address   = {Weinheim},
  isbn      = {1437-0980 (E-Journal); 0171-5445 (Print)},
  pages     = {65 -- 71},
  year      = {2009},
  language  = {de}
}
@incollection{BorchertHintze2009,
  author    = {Borchert, J{\"o}rg and Hintze, D.},
  title     = {Der Aufbau von Handelseinheiten},
  series = {Energiehandel in Europa},
  booktitle = {Energiehandel in Europa},
  editor    = {Zenke, Ines},
  edition   = {2. Aufl.},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  isbn      = {978-3-406-58373-5},
  pages     = {393 -- 410},
  year      = {2009},
  language  = {de}
}
@article{Buedenbender2009,
  author    = {B{\"u}denbender, Martin},
  title     = {Der Atomausstieg in Deutschland - ein zukunftsf{\"a}higer Sonderweg im europ{\"a}ischen Kontext?},
  series = {atw International Journal for Nuclear Power},
  volume    = {54},
  journal   = {atw International Journal for Nuclear Power},
  number    = {10},
  publisher = {Inforum},
  address   = {Berlin},
  issn      = {14315254},
  pages     = {616 -- 627},
  year      = {2009},
  language  = {de}
}
@article{BienerSasse2009,
  author    = {Biener, Ernst and Sasse, Torsten},
  title     = {Deponiebauprojekte gestern, heute und morgen : Ver{\"a}nderungen, Stand und Tendenzen aus der Sicht eines planenden Ingenieurb{\"u}ros / Sasse, Torsten ; Biener, Ernst},
  pages     = {1 -- 13},
  year      = {2009},
  language  = {de}
}
@article{Stulpe2009,
  author    = {Stulpe, Werner},
  title     = {Density Operator},
  series = {Compendium of Quantum Physics : concepts, experiments, history and philosophy / Daniel Greenberger ... ed.},
  journal   = {Compendium of Quantum Physics : concepts, experiments, history and philosophy / Daniel Greenberger ... ed.},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {978-3-540-70622-9},
  pages     = {166 -- 169},
  year      = {2009},
  language  = {en}
}
@article{Weigand2009,
  author    = {Weigand, Christoph},
  title     = {Defining Precisions for Reliable Measurement and Estimation Procedures},
  series = {Economic Quality Control. 24 (2009), H. 1},
  journal   = {Economic Quality Control. 24 (2009), H. 1},
  publisher = {De Gruyter},
  address   = {Berlin},
  isbn      = {0940-5151},
  pages     = {5 -- 33},
  year      = {2009},
  language  = {en}
}