Shiferaw R. Jufar and  Rong F. Huang and  Ching M. Hsu,  Spreading of Swirling Double–Concentric Jets at Low and High Pulsation Intensities.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 1121 - 1126
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/12512.