Asrori, Asrori, and Sugeng Hadi Susilo. “The Development of Fresnel Lens Concentrators for Solar Water Heaters: A Case Study in Tropical Climates”. EUREKA: Physics and Engineering, no. 3 (May 31, 2022): 3-10. Accessed March 29, 2024. http://journal.eu-jr.eu/engineering/article/view/2441.