1. K. H. PRARHUDEV: ‘Handbook of heat treatment of steel’, 26–29; 1988, New Delhi, McGraw Hill.
2. J. LU: ‘Handbook of measurement of residual stresses’, 71–134; 1996, Bethel, CT, Society for Experimental Mechanics.
3. I. C. NOYAN and J. B. COHEN: ‘Residual stress — measurement by diffraction and interpretation’, 75–116; 1987, Berlin, Springer Verlag.
4. N. L. LOH: ‘Plasma nitriding of 3%Cr—Mo steel’, PhD thesis, Liverpool University, UK, 1980, 83-92.