S. Kalpakjian and S.R. Schmid, Manufacturing Engineering and Technology, Dorling Kindersley Pvt Ltd, 2011, pp. 340-341.
 G.F. Vander Voort, Advanced Materials and Processes, ASM International, 2015, 127(2), pp.22-25.
 A. Bramley and K.F. Allen, Engineering (London), Vol 133, p 92-94, 123-126, 229-231, and 305-306, 1932.
 J.K. Stanley, Iron Age, Vol 151, p 31-39 and 49-55, 1943.
 G.A., Hamkin and M.H. Becker, Journal of Iron and Steel Institute, 125, 1931, p387.
 A.S. Kenneford and G.C. Ellis, Journal of Iron and Steel Institute, 164, 1950, p265.
 R.L. Mattson and J.G. Roberts, SAE Transactions 68, 1980, pp. 130-136.
 W. Koenecke, N.K. Burrell, and C. Mehelich, Metal Improvement company, Paramus NJ ,Subsidiary of Curtiss-Wright Cooperation, October 1982, Spring, Technical Article #1982016.
 N. Chakraborti, B. Siva Kumar, V. Satish Babu, S. Moitra, and Mukhopadhyay, Proceedings, 14th International Workshop on Computational Mechanics of Materials, 2006.
 N. Jin and S. Y. Zhou, Transactions of the North American Manufacturing Research Institute of SME 32, 2004.
 S. K. Biswas, S. J. Chen and A. Satyanarayana, Journal of Dynamical and Control Systems, vol. 7, 1997, pp. 327-340.
 J. Xu, D. Zhang and B. Shen, International Conference on Shot Peening-I, 1981, Paris. 1981074, pp.367-374.
 B. Sustarsic, P. Borkovic, W. Echlseder, G. Gerstmayr, A. Javidi and B. Sencic, Journal of Structural Integrity and Life V.11.1, 2011, pp.27-34.
 C.K. Clarke and G.E. Borowski, Journal of Failure Analysis and Prevention, V5(6), December 2005, pp54-63.
 ASTM E112-13, Standard Test Methods for Determining Average Grain Size, ASTM International, West Conshohocken, PA, 2013, www.astm.org.