Federico Amato and  Gabriele Bedon and  Marco Raciti Castelli and  Ernesto Benini,  Numerical Analysis of the Influence of Tip Devices on the Power Coefficient of a VAWT.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 1053 - 1060
    [viewed 21 October 2021]. Available from: https://publications.waset.org/pdf/8087.