@proceedings{zhao2012analysis,
  title = {Analysis on the Characteristic of Energy Flow in Urban Ecological Economic System—A Case of Xiamen City}
  author = {Zhao, W.},
  publisher = {Procedia Environmental Sciences},
  url = {http://www.sciencedirect.com/science/article/pii/S1878029612002174},
  doi = {10.1016/j.proenv.2012.01.216},
  year = {2012}
}