1. 1) M. N. Watson: Ph.D. thesis, University of Southampton, (1980).
2. 2) S. I. Novaes Gomes: Ph.D. thesis, University of Sao Paulo, (1985).
3. 3) R. B. Oldland: Aust. Weld. Res., 14 (1985), 44.
4. 4) O. Grong and D. K. Matlock: Int. Met. Rev., 31 (1986), 27.
5. 5) C. Bonnet and F. P. Charpentier: Proc. Int. Conf. on Effect of Residual, Impurity and Microalloying Elements on Elements on Weldability and Weld Properties, TWI, London, (1983), Paper 8.