1. W. M. Thomas, E. D. Nicholas, J. C. Needham, M. G. Murch, P. Temple-Smith, and C. J. Dawes, International Patent Application No. PCT/GB92/02203; GB Patent Application No. 9125978.8; U.S Patent No. 5,460,317 (1991).
2. C. J. Dawes, Weld. Met. Fab. 63, 13 (1995).
3. A. Oosterkamp, L. D. Oosterkamp, and A. Nordeide, Weld. J. 83, 225s (2004).
4. W. M. Thomas and E. D. Nicholas, Mater. Design 18, 269 (1997).
5. O. V. Flores, Scripts mater. 38, 703 (1998).