@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{Biener2005,
  author    = {Biener, Ernst},
  title     = {Abfallwirtschaft},
  series = {Wendehorst Beispiele aus der Baupraxis / Otto W. Wetzell (Hrsg.). Bearb. von: Herwig Baumgartner ...},
  booktitle = {Wendehorst Beispiele aus der Baupraxis / Otto W. Wetzell (Hrsg.). Bearb. von: Herwig Baumgartner ...},
  publisher = {Teubner},
  address   = {Stuttgart},
  isbn      = {3-519-00489-5},
  pages     = {255 -- 269},
  year      = {2005},
  language  = {de}
}