1. United Nations Department of Economic and Social Affairs (2018). News. https://www.un.org/development/desa/en/news/population/2018-revision-of-world-urbanization-prospects.html
2. The World Bank (2019). Urban population (% of total population). https://data.worldbank.org/indicator/SP.URB.TOTL.IN.ZS
3. Ritchie H, Roser M (2019) Our world in data: urbanization. https://ourworldindata.org/urbanization
4. Robbins P (2014) Urbanization: the rise of new world cities. The teaching company, understanding cultural and human geography, lecture No. 15
5. United Nations Department of Economic and Social Affairs (2018b) World urbanization prospects. https://population.un.org/wup/Country-Profiles/