Rizal Al Faqih1, Yohanes Gunawan1,2, Nandy Putra*, Imansyah Ibnu Hakim, Kukuh Tri Margono. “An Experimental Study of Hybrid Solar and Geothermal Energy With Applying Heat Pipe to Enhance The Performance of The Cacao Beans Drying Process”. International Journal of Advanced Science and Technology 29, no. 7s (May 1, 2020): 3411-3421. Accessed September 18, 2021. https://sersc.org/journals/index.php/IJAST/article/view/17629.