1. International Energy Agency. Africa Energy Outlook. A Focus on prospects in sub-Saharan Africa. World Energy Outlook special Report, 2014. OECD/IEA, Paris: 30–33.
2. Population Reference Bureau. 2014 World Population Data sheet. USAID, .
3. Solar lighting;Pode,2011
4. Energy and Sustainable development in Nigeria: the way forward;Oyedope;Energy Sustain Soc,2012
5. Bleeker AEM. Diffusion of solar PV from a TIS perspective and its transnational factors: A case study of Tanzania. Institute of Environmental studies, VU University Amsterdam, 2013. .