M. Raciti Castelli and  G. Grandi and  E. Benini,  Numerical Analysis of the Performance of the DU91-W2-250 Airfoil for Straight-Bladed Vertical-Axis Wind Turbine Application.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2012, vol. 63(3). 706 - 711
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/8343.