1. Colligan, K. (1999), “Material flow behavior during friction stir welding”,Welding Journal, Vol. 78 No. 7, pp. 229s‐37s.
2. Cook, G.E., Smartt, H.B., Mitchell, J.E., Strauss, A.M. and Crawford, R. (2003), “Controlling robotic friction stir welding”,Welding Journal, Vol. 82 No. 6, pp. 28‐34.
3. Compliant Robot Motion I. A Formalism for Specifying Compliant Motion Tasks
4. Adaptive voltage control in fusion arc welding
5. Nunes, A.C. (2001), “Wiping metal transfer in friction stir welding”,TMS Annual Meeting, New Orleans.