Adnan Fadilah, Putra, and Dadang Furqon Era. “Contra Rotating Ducted Propeller Analysis Using Computational Fluid Dynamics”. International Journal of Engineering & Technology 7, no. 4.25 (November 30, 2018): 18–23. Accessed November 22, 2024. https://sciencepubco.com/index.php/ijet/article/view/22241.