1. Demand Side Management – Module 14. Sustainable energy regulation and policy making for Africa [Online]. Available: 〈http://africa-toolkit.reeep.org/modules/Module14.pdf〉 [Accessed 10.04.15].
2. Evolution of water lifting devices (pumps) over the centuries worldwide;Yannopoulos;Water,2015
3. Supply Side Management – Module 14. Sustainable energy regulation and policy making for Africa [Online]. Available: 〈http://www.unido.org/fileadmin/import/83266_Module14.pdf〉 [Accessed 10.04.15].
4. Electricity Supply and Demand Side Management Options, Final Version, November 2000. [Online]. Available: 〈http://sei-us.org/Publications_PDF/SEI-WCD-ElectricitySupply%26DSMoptions-00.pdf〉 [Accessed 10.05.14].
5. Energy security and sustainability in Northeast Asia;Von Hippel;Energy Policy,2011