Sergey I. Shtork and  Aleksey P. Vinokurov and  Sergey V. Alekseenko,  Study of Unsteady Swirling Flow in a Hydrodynamic Vortex Chamber.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2012, vol. 72(12). 2751 - 2754
    [viewed 19 October 2019]. Available from: https://publications.waset.org/pdf/9390.