1. Alonzo, R., Balisacan, A., Canlas, D., Capuno, J., Clarete, R., Danao, R., et al. (2004). Population and poverty: The real score. Discussion paper 415. University of the Philippines, Accessed 24 July 2017.
http://www.econ.upd.edu.ph/dp/index.php/dp/article/view/120/117
.
2. Andorka, R. (1978). Determinants of fertility in advanced societies. London: Methuen & Co.
3. Bakilana, A. (2016). Why are fertility rates so high in Sub-Saharan Africa?
https://www.weforum.org/agenda/2016/05/why-are-fertility-rates-so-high-in-sub-saharan-africa
.
4. Basu, A. M. (2002). Why does education lead to lower fertility? A critical review of some of the possibilities. World Development,
30(10), 1779–1790.
5. Becker, G. S. (1991). A treatise on the family. Cambridge, MA: Harvard University Press.