WASET
    Iau-Teh Wang and  Chin-Yu Lee,  Influence of Slope Shape and Surface Roughness on the Moving Paths of a Single Rockfall.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2010, vol. 41(5). 122 - 128
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/4567.