@techreport{BunseIrrekSirakietal.2010,
  author    = {Bunse, Maike and Irrek, Wolfgang and Siraki, Klara and Renner, Gisela},
  title     = {Task 2.1: National report on the energy efficiency business in Germany},
  institution = {Wuppertal Institut f{\"u}r Klima, Umwelt, Energie},
  address   = {Wuppertal},
  pages     = {39},
  year      = {2010},
  language  = {en}
}