John S. Lanuza, Elymer, Michael C. Pacis, Ronald Vincent Santiago, and Gorgonio S. Vallestero II. “Comparison of Energy Output of Multi-Angle Positioned Windmill Propeller Blades”. International Journal of Engineering and Technology 7, no. 4.38 (December 3, 2018): 1666–1668. Accessed August 16, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/29229.