A. Ince,  Stress and Strain Analysis of Notched Bodies Subject to Non-Proportional Loadings.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2015, vol. 102(6). 935 - 939
    [viewed 26 February 2020]. Available from: https://publications.waset.org/pdf/10001407.