@article{newell2015the,
  title = {The boundaries of urban metabolism: Towards a political–industrial ecology}
  author = {Newell, Joshua P. and Cousins, Joshua J.},
  journal = {Progress in Human Geography},
  url = {http://journals.sagepub.com/doi/10.1177/0309132514558442},
  doi = {10.1177/0309132514558442},
  year = {2015}
}