@article{huang2008material,
  title = {Material flow analysis (MFA) of an eco-economic system: a case study of Wujin District, Changzhou, China}
  author = {Huang, Heping; Bi, Jun; Li, Xiangmei; Zhang, Bing; Yang, Jie},
  journal = {Frontiers in Biology China},
  url = {https://doi.org/10.1007/s11515-008-0045-7},
  doi = {10.1007/s11515-008-0045-7},
  year = {2008}
}