1. R.G. Davies and C.L. Magee:J. Met., 1979, vol. 31, no. 11, pp. 17–23.
2. M. S. Rashid: SAE Preprint Numbers 760206, February 1976.
3. R.G. Davies:J. Appl. Metalwork., 1981, vol. 1, pp. 45–52.
4. George E. Dieter, Jr.,Mechanical Metallurgy, 1st ed., p. 417, McGraw-Hill Book Company, New York, 1961.