Krätzig, Wilfried B. “Solar Updraft Power Technology: Fighting Global Warming and Rising Energy Costs”. Journal of Technology Innovations in Renewable Energy 4, no. 2 (June 15, 2015): 52–64. Accessed August 9, 2026. http://pms.lifescienceglobal.com/index.php/jtire/article/view/3103.