@article{li2009hybrid,
  title = {Hybrid Emergy-LCA (HEML) based metabolic evaluation of urban residential areas: The case of Beijing, China}
  author = {Li, Dong; Wang, Rusong},
  journal = {Ecological Complexity},
  url = {http://www.sciencedirect.com/science/article/pii/S1476945X09000877},
  doi = {10.1016/j.ecocom.2009.09.002},
  year = {2009}
}