@article{ibrahim2012greenhouse,
  title = {Greenhouse gas emissions from cities: comparison of international inventory frameworks}
  author = {Ibrahim, Nadine; Sugar, Lorraine; Hoornweg, Dan; Kennedy, Christopher},
  journal = {Factor X: Challenges, Implementation Strategies and Examples for a Sustainable Use of Natural Resources},
  url = {https://doi.org/10.1080/13549839.2012.660909},
  doi = {10.1080/13549839.2012.660909},
  year = {2012}
}