Mahmoud M. Tash,  Effect of Alloying Elements and Hot Forging/Rolling Reduction Ratio on Hardness and Impact Toughness of Heat Treated Low Alloy Steels.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2015, vol. 102(6). 625 - 634
    [viewed 23 September 2020]. Available from: https://publications.waset.org/pdf/10001402.