Omer S. Mughieda,  Stress Analysis of Non-persistent Rock Joints under Biaxial Loading.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2012, vol. 62(2). 211 - 216
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/1045.