WASET
    Corné J. Coetzee and  Etienne Horn,  Calibration of the Discrete Element Method Using a Large Shear Box.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2014, vol. 96(12). 2127 - 2136
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10001410.