R. Biswal, S., and S. T. Nayak. “Impact of Tempering Factors on Mechanical Properties of Ck55 Steel (0.55wt%C - 0.75wt%Mn)”. International Journal of Engineering & Technology, vol. 7, no. 4.39, Dec. 2018, pp. 238-41, https://doi.org/10.14419/ijet.v7i4.39.23939.