Hsieh, Wen-Hsiang, and Shou-Jui Chen. “Innovative Design of Cam-Controlled Planetary Gear Trains”. International Journal of Engineering and Technology Innovation 1, no. 1 (October 1, 2011): 1–11. Accessed June 18, 2024. https://ojs.imeti.org/index.php/IJETI/article/view/3.