1. United Nations (Habitat III) The New Urban Agendahttp://habitat3.org/wp-content/uploads/NUA-English.pdf
2. UNDESA World Urbanization Prospects: The 2018 Revision. Key Factshttps://esa.un.org/unpd/wup/Publications/Files/WUP2018-KeyFacts.pdf
3. Report of the World Commission on Environment and Development: Our Common Futurehttp://www.un-documents.net/our-common-future.pdf
4. Ellen MacArthur Foundation Completing the Picture: How the Circular Economy Tackles Climate Changehttps://www.ellenmacarthurfoundation.org/assets/downloads/Completing_The_Picture_How_The_Circular_Economy-_Tackles_Climate_Change_V3_26_September.pdf
5. European Commission Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions. Closing the Loop—An EU Action Plan for the Circular Economy. COM(2015) 614 Finalhttps://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A52015DC0614