1. A Decade of Major Earthquakes: Lessons for Business;Bevere,2019
2. Global issues: Population;United Nations,2019
3. United Nations, Department of Economic and Social Affairs, Population Division, World Population Prospects 2019: Highlights (ST/ESA/SER.A/423), Tech. Rep., United Nations, 2019, p. 46, URL:.
4. World population prospects 2019;United Nations,2019
5. World Cities Report 2020;United Nations Human Settlements Programme,2020