@article{krook2011urban,
  title = {Urban mining: hibernating copper stocks in local power grids}
  author = {Krook, Joakim; Carlsson, Annica; Eklund, Mats; Frändegård, Per; Svensson, Niclas},
  journal = {Journal of Cleaner Production},
  doi = {10.1016/j.jclepro.2011.01.015},
  year = {2011}
}