Iau-Teh Wang and  Chin-Yu Lee,  Simulation and Statistical Analysis of Motion Behavior of a Single Rockfall.   journal   = {International Journal of Geotechnical and Geological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2012, vol. 61(1). 17 - 26
    [viewed 04 May 2024]. Available from: https://publications.waset.org/pdf/11288.