@incollection{Spangenberg1997,
  author    = {Spangenberg, Joachim H.},
  title     = {Environmental space-based proactive linkage indicators : a compass on the road towards sustainability},
  booktitle = {Sustainability indicators : a report on the project on indictors of sustainable development},
  editor    = {Moldan, Bedrich},
  publisher = {Wiley},
  address   = {Chichester},
  pages     = {119 -- 124},
  year      = {1997},
  language  = {en}
}