@book{Tietze2009,
  author    = {Tietze, J{\"u}rgen},
  title     = {Einf{\"u}hrung in die Finanzmathematik : klassische Verfahren und neuere Entwicklungen: Effektivzins- und Renditeberechnung, Investitionsrechnung, derivative Finanzinstrumente ; mit {\"u}ber 500 {\"U}bungsaufgaben / J{\"u}rgen Tietze. 9., {\"u}berarb. Aufl.},
  publisher = {Vieweg + Teubner},
  address   = {Wiesbaden},
  isbn      = {978-3-8348-0467-9},
  pages     = {XII 431 S. : graph. Darst.},
  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}
}
@article{StulpeScholz2009,
  author    = {Stulpe, Werner and Scholz, Erhard},
  title     = {Hilbert Space / Scholz, Erhard ; Stulpe, Werner},
  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     = {291 -- 295},
  year      = {2009},
  language  = {en}
}
@article{Stulpe2009,
  author    = {Stulpe, Werner},
  title     = {Projection},
  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     = {497 -- 499},
  year      = {2009},
  language  = {en}
}
@article{Stulpe2009,
  author    = {Stulpe, Werner},
  title     = {Self-Adjoint 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     = {692 -- 697},
  year      = {2009},
  language  = {en}
}
@article{Stulpe2009,
  author    = {Stulpe, Werner},
  title     = {Unitary 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     = {807 -- 809},
  year      = {2009},
  language  = {en}
}
@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{Stulpe2009,
  author    = {Stulpe, Werner},
  title     = {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     = {440 -- 444},
  year      = {2009},
  language  = {en}
}
@incollection{Strohmeier2009,
  author    = {Strohmeier, Andreas},
  title     = {Siedlungswasserwirtschaft},
  series = {Wendehorst Beispiele aus der Baupraxis. - 3. Aufl.},
  booktitle = {Wendehorst Beispiele aus der Baupraxis. - 3. Aufl.},
  publisher = {Springer Vieweg},
  address   = {Wiesbaden},
  isbn      = {978-3-8348-0684-0 ; 978-3-8348-9997-2},
  doi       = {10.1007/978-3-8348-9997-2_15},
  pages     = {423 -- 462},
  year      = {2009},
  language  = {de}
}
@article{StreunLarueParletal.2009,
  author    = {Streun, M. and Larue, H. and Parl, C. and Ziemons, Karl},
  title     = {A compact PET detector readout using charge-to-time conversion},
  series = {2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC)},
  journal   = {2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC)},
  publisher = {IEEE},
  address   = {New York},
  isbn      = {1082-3654},
  pages     = {1868 -- 1870},
  year      = {2009},
  abstract  = {The readout of gamma detectors is considerably simplified when the event intensity is encoded as a pulse width (Pulse Width Modulation, PWM). Time-to-Digital-Converters (TDC) replace the conventional ADCs and multiple TDCs can be realized easily in one PLD chip (Programmable Logic Device). The output of a PWM stage is only one digital signal per channel which is well suited for transport so that further processing can be performed apart from the detector. This is particularly interesting for large systems with high channel density (e.g. high resolution scanners). In this work we present a circuit with a linear transfer function that requires a minimum of components by performing the PWM already in the preamp stage. This allows a very compact and also cost-efficient implementation of the front-end electronics.},
  language  = {en}
}