@techreport{Doering1997,
  author    = {D{\"o}ring, Bernd},
  title     = {Nutzung erneuerbarer Energien in Landesbauten : Dokumentation realisierter und geplanter Anlagen},
  publisher = {Landesinstitut f{\"u}r Bauwesen des Landes Nordrhein-Westfalen},
  address   = {Aachen},
  isbn      = {3-930860-51-1},
  pages     = {66 S.},
  year      = {1997},
  language  = {de}
}
@article{BienerBoykenSasse1997,
  author    = {Biener, Ernst and Boyken, P. and Sasse, T.},
  title     = {Integrated dredged material management system of Bremen-Seehausen},
  series = {Sardinia 97 : proceedings ; [13 - 17 October 1997, S. Margherita di Pula - Cagliari, Sardinia, Italy] / Sixth International Landfill Symposium. Ed.: Thomas H. Christensen... - Bd. 5 : Landfill regulations, waste characteristics, landfilling in middle and lower income countries, industrial wastes and monolandfills},
  journal   = {Sardinia 97 : proceedings ; [13 - 17 October 1997, S. Margherita di Pula - Cagliari, Sardinia, Italy] / Sixth International Landfill Symposium. Ed.: Thomas H. Christensen... - Bd. 5 : Landfill regulations, waste characteristics, landfilling in middle and lower income countries, industrial wastes and monolandfills},
  publisher = {CISA, Environmental Sanitary Engineering Centre},
  address   = {Cagliari},
  pages     = {497 -- 502},
  year      = {1997},
  language  = {en}
}