1. United Nations, 2012 World Urbanization Prospects: The 2011 Revision, Department of Economic and Social Affairs (United Nations, New York).
2. Cities and greenhouse gas emissions: moving forward;Hoornweg;Environ. Urban.,2011
3. United Nations, Department of Economic and Social Affairs, Population Division (2016). The World's Cities in 2016 – Data Booklet (ST/ESA/SER.A/392).
4. Seto K. C. et al. , 2014: Human Settlements, Infrastructure and Spatial Planning. In: Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Edenhofer, O., et al., (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA. Available at: http://www.ipcc.ch/pdf/assessment-report/ar5/wg3/ipcc_wg3_ar5_chapter12.pdf.
5. United Nations, 2016. Sustainable Development Goals – 17 Goals to Transform Our World www.un.org/sustainabledevelopment/(Accessed April 2017).