Gabriele Bedon and  Marco Raciti Castelli and  Ernesto Benini,  Experimental Tests of a Vertical-Axis Wind Turbine with Twisted Blades.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 601 - 604
    [viewed 01 December 2021]. Available from: https://publications.waset.org/pdf/4741.