Aryo Adi Bhaskoro, et al. “Design of a Low RPM Vertical Axis Wind Turbine (PTLB) With a Three-Stage Gear System for Increasing Generator Rotational Speed”. Semarak International Journal of Mechanical Precision Engineering, vol. 8, no. 1, Oct. 2026, pp. 1-10, http://semarakilmu.my/index.php/sijmpe/article/view/1229.