1. D.R. White: Adv. Mater. Process., 2003, vol. 161, pp. 64–65.
2. C.Y. Kong, R.C. Soar, and P.M. Dickens: J. Mater. Process. Tech., 2004, vol. 146, pp. 181-87.
3. K. Graff: private communication, April 30, 2009.
4. S.S. Babu, O. Barabash, and K. Graff: Edison Welding Institute, Columbus, OH, unpublished research, 2010.
5. D.E. Schick, R.M. Hahnlen, R. Dehoff, P. Collins, S.S. Babu, M.J. Dapino, and J.C. Lippold: Weld. J., 2010, vol. 89, pp. 105-15-s.