Howard Miller, Alfred, Fesmi Abdul Majeed, Suhair Alwahabi, Mazin Abuharaz, Anil Midathada, and Chanyalew Belachew. “FC Geo-Cool: Earth Coupled Solar Assisted Hybrid Heat Pump Energy Efficient Cooling System”. International Journal of Engineering & Technology 8, no. 3 (August 25, 2019): 246–251. Accessed April 29, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/29452.