@article{chen2015urban,
  title = {Urban energy consumption: Different insights from energy flow analysis, input–output analysis and ecological network analysis}
  author = {Chen, Shaoqing; Chen, Bin},
  journal = {Applied Energy},
  url = {http://www.sciencedirect.com/science/article/pii/S0306261914011052},
  doi = {10.1016/j.apenergy.2014.10.055},
  year = {2015}
}