@incollection{SchemmLintzelBorchert2005,
  author    = {Schemm, R. and Lintzel, P. and Borchert, J{\"o}rg},
  title     = {Typische Elemente des Handelsmarktes},
  series = {Energiehandel in Europa},
  booktitle = {Energiehandel in Europa},
  editor    = {Zenke, Ines},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  isbn      = {3-406-52443-5},
  pages     = {195 -- 216},
  year      = {2005},
  language  = {de}
}
@incollection{BorchertSchemmLintzel2005,
  author    = {Borchert, J{\"o}rg and Schemm, R. and Lintzel, P.},
  title     = {Risiken des Handelsgesch{\"a}ftes},
  series = {Energiehandel in Europa},
  booktitle = {Energiehandel in Europa},
  editor    = {Zenke, Ines},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  isbn      = {3-406-52443-5},
  pages     = {218 -- 235},
  year      = {2005},
  language  = {de}
}
@incollection{LintzelBorchert2009,
  author    = {Lintzel, P. and Borchert, J{\"o}rg},
  title     = {Risiken des Handels},
  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     = {239 -- 247},
  year      = {2009},
  language  = {de}
}
@incollection{BorchertLintzel2012,
  author    = {Borchert, J{\"o}rg and Lintzel, P.},
  title     = {Risiken des Handels},
  series = {Energiehandel in Europa},
  booktitle = {Energiehandel in Europa},
  editor    = {Zenke, Ines},
  edition   = {3. Aufl.},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  isbn      = {978-3-9813142-9-8},
  pages     = {303 -- 312},
  year      = {2012},
  language  = {de}
}