Gustavo Rodrigues and  Hans Weber and  Larissa Driemeier,  Elastic and Plastic Collision Comparison Using Finite Element Method.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2019, vol. 149(5). 354 - 358
    [viewed 29 May 2020]. Available from: https://publications.waset.org/pdf/10010379.