@article{liu2017a,
  title = {A framework for the urban eco-metabolism model - Linking metabolic processes to spatial patterns}
  author = {Liu, Wen; Chang, Andrew C.; Chen, Weiping; Zhou, Weiqi; Feng, Qi},
  journal = {Journal of Cleaner Production},
  url = {http://www.sciencedirect.com/science/article/pii/S095965261731483X},
  doi = {10.1016/j.jclepro.2017.07.055},
  year = {2017}
}