WASET
    M. Abdallah,  Numerical Modeling of Various Support Systems to Stabilize Deep Excavations.   journal   = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2017, vol. 127(7). 624 - 629
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10007537.