Mahdi Fakoor and  Seyed Mohammad Navid Ghoreishi,  Failure Criterion for Mixed Mode Fracture of Cracked Wood Specimens.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2017, vol. 127(7). 1371 - 1377
    [viewed 24 January 2021]. Available from: https://publications.waset.org/pdf/10007571.