WASET
    Shinji Kajiwara,  Numerical Simulation and Experimental Validation of the Hydraulic L-Shaped Check Ball Behavior.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2015, vol. 98(2). 308 - 311
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10000540.