WASET
    Khaled. M. Faqih,  A Vortex Plate Theory of Hovering Animal Flight.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2010, vol. 45(9). 841 - 852
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/662.