S. Bajalan and  A. Shadaram and  N. Hedayat and  A. Shams Taleghani,  Experimental Study of Frequency Behavior for a Circular Cylinder behind an Airfoil.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2011, vol. 59(11). 2349 - 2353
    [viewed 17 May 2022]. Available from: https://publications.waset.org/pdf/11964.