WASET
    M. Yousaf and  S. Usman,  Sinusoidal Roughness Elements in a Square Cavity.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2015, vol. 99(3). 525 - 529
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10000928.