@article{haberl2008the,
  title = {The Energetic Metabolism of the European Union and the United States: Decadal Energy Input Time-Series with an Emphasis on Biomass}
  author = {Haberl, Helmut and Weisz, Helga and Amann, Christof and Bondeau, Alberte and Eisenmenger, Nina and Erb, Karl-Heinz and Fischer-Kowalski, Marina and Krausmann, Fridolin},
  journal = {Journal of Industrial Ecology},
  url = {http://doi.wiley.com/10.1162/jiec.2006.10.4.151},
  doi = {10.1162/jiec.2006.10.4.151},
  year = {2008}
}