WASET
Castelli, M. , Grandi, G. , Benini, E.. "Numerical Analysis of the Performance of the DU91-W2-250 Airfoil for Straight-Bladed Vertical-Axis Wind Turbine Application". World Academy of Science, Engineering and Technology, Open Science Index 63, International Journal of Aerospace and Mechanical Engineering (2012), 6(3), 706 - 711.