@article{smit2019towards,
  title = {Towards Measuring the Informal City: A Societal Metabolism Approach}
  author = {Smit, Suzanne; Musango, Josephine K.; Kovacic, Zora; Brent, Alan C.},
  journal = {Factor X: Challenges, Implementation Strategies and Examples for a Sustainable Use of Natural Resources},
  url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/jiec.12776},
  doi = {10.1111/jiec.12776},
  year = {2019}
}