WASET
    Ibrahim Beldjilali and  Adel Ghenaiet,  Numerical and Experimental Investigation of the Aerodynamic Performances of Counter-Rotating Rotors.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2019, vol. 153(9). 598 - 606
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10010748.