Sitinjak, Kander Ari Gok Tua, Jufrizal Jufrizal, and Muhammad Idris. “Development of a Mathematical Model to Predict Wind Energy Potential and Vertical Axis Wind Turbine Efficiency”. IRA Journal of Engineering Science and Technology 1, no. 1 (June 30, 2025): 16–24. Accessed October 8, 2025. https://e-journals.irapublishing.com/index.php/IRAJEST/article/view/133.