WASET
Castelli, M. , Betta, S. , Benini, E.. "Proposal of a Means for Reducing the Torque Variation on a Vertical-Axis Water Turbine by Increasing the Blade Number". World Academy of Science, Engineering and Technology, Open Science Index 64, International Journal of Mechanical and Mechatronics Engineering, (2012), 6(4), 756 - 762.