1. Bell, C. (2017) Manchester’s Tree Change: From an Industrial to a Green Revolution. http://planetark.org/news
2. Bibby, P. & Brindley, P. (2013). Urban and rural area definitions for policy purposes in England and wales: Methodology (v1.0). Government Statistical Service (August). https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/239477/RUC11methodologypaperaug_28_Aug.pdf
3. BlueSky. (2023). National Tree Map. Retrieved from: https://bluesky-world.com/ntm/
4. Bristol Tree Forum. (2022). Measuring and Modelling the Tree Canopy of Bristol. https://bristoltreeforum.org/2022/11/21/the-tree-canopy-of-bristol/