WASET
    Tahany W. Sadak,  Cyclic Heating Effect on Hardness of Copper.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2016, vol. 113(5). 985 - 988
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10004772.