M. Saravani and  M. Azizi and ,  The Investigation of Crack's Parameters on the V-Notch using Photoelasticity Method.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2011, vol. 49(1). 152 - 157
    [viewed 26 January 2020]. Available from: https://publications.waset.org/pdf/5136.