Ridwan Arief Subekti, Fazila Mohd-Zawawi, Kamarulafizam Ismail, et al. Effect of the Number of Blades and Variations in Position of Straight Blades on Vortex Turbine Efficiency. IJIE. 2025;17(4):301-315. Accessed April 9, 2026. https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/22892