1. White, R., Jane, T, Gwyneth, L.: Greening Africa’s cities: enhancing the relationship between urbanization, environmental assets and ecosystem services, pp. 12–13. Washington, DC (2017)
2. UN Habitat: The Management of Secondary Cities in South East Asia. Nairobi, Kenya (1996)
3. UN Habitat: The state of African cities: Re-imagining sustainable urban transitions. 2nd edn. UN Habitat, Nairobi, Kenya (2014)
4. United Nations: The World’s Cities in 2018. United Nations (2018)
5. IPCC. Climate Change: Mitigation of Climate Change (2014)