Yap, Hiong Yang, and Boon Ching Kok. “Charge Controller for Solar-Wind Hybrid Energy Harvesting System”. Evolution in Electrical and Electronic Engineering, vol. 4, no. 2, Oct. 2023, pp. 133-9, https://penerbit.uthm.edu.my/periodicals/index.php/eeee/article/view/12593.