1. The State of Food Security and Nutrition in the World 2018. Building Climate Resilience for Food Security and Nutrition;FAO,2018
2. World Bank, https://data.worldbank.org (2019).
3. World Population Prospects: The 2017 Revision, United Nations;UNPD,2017
4. Urbanization and its implications for food and farming;Satterthwaite;Philos. Trans. R. Soc. Lond. B: Biol. Sci.,2010
5. World Urbanization Prospects: The 2018 Revision;UNPD,2018