Hedden, S. (2016). "Parched Prospects II: A Revised Long-Term Water Supply and Demand Forecast for South Africa." African Futures Paper No. 16. Institute for Security Studies and Frederick S. Pardee Center for International Futures, Josef Korbel School o
Hillebrand, E. (2011). “Poverty, Growth, and Inequality over the Next 50 Years.” In Conforti, P. ed., Looking Ahead in World Agriculture: Perspectives to 2050. Rome: Food and Agriculture Organization of the United Nations, 159-190.