@article{xiaoyue2017urban,
  title = {Urban Metabolism of Three Cities in Jing-Jin-JiUrban Agglomeration, China: Using theMuSIASEM Approach}
  author = {Xiaoyue Wang, Shuyao Wu and Shuangcheng Li},
  journal = {Sustainability},
  doi = {10.3390/su9081481},
  year = {2017}
}