1. Frank O. The Demography Of Fertility And Infertility. Geneva: World Health Organization; 2017.
2. Population Institute. Demographic Vulnerability: Where population Growth poses the greatest Challenges. America: Washington DC; 2015. Available from:
https://www.populationinstitute.org/external/DVI_report.pdf
3. United Nations, Department of Economic and Social Affairs, Population Division (2017). World Population Prospects: The 2017 Revision, DVD Edition.
4. Central statistical agency (CSA) [Ethiopia] and ICF. Ethiopia demographic health survey. Addis Ababa, and Rockville: CSA and ICF; 2016.
5. Hailemariam A. Implementation of the population policy of Ethiopia: achievements and challenges. Popul Horiz. 2016;13(1):19–30.