@article{karl2012raw,
  title = {Raw Material Consumption of the European Union - Concept, Calculation Method, and Results}
  author = {Karl Schoer and Jan Weinzettel and Jan Kovanda and Jürgen Giegrich and Christoph Lauwigi},
  journal = {Environmental Science & Technology},
  doi = {10.1021/es300434c},
  year = {2012}
}