Rohit Sharma and  Fabio Cozzi,  Experimental Study of Unconfined and Confined Isothermal Swirling Jets.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 122(2). 386 - 396
    [viewed 28 January 2022]. Available from: https://publications.waset.org/pdf/10006459.