M. Shairf, H. ., A. M. . Belhaj, and S. A. . Shawesh. “A CFD Analysis of Winglet Angle Effects on the Hover Performance of a Helicopter Rotor”. Arraid Journal of Science and Technology ( AJST), vol. 2, no. 2, Jan. 2025, pp. 1-8, https://www.ajst.shomokh.edu.ly/index.php/AJST/article/view/111.