1. G. K. Sigworth: Proc. 6th International AFS Conference on ‘Melt treatment of aluminum’, Orlando, Florida, 11-13 November 2001, pp. 210-221.
2. G. K. Sigworth, H. Koch and P. Krug: ‘Light metals 2001, Métaux léger’, (eds. M. Sahoo and T. J. Lewis), 349-357: 2001, Montreal, Quebec, Canadian Inst. Mining, Metallurgy and Petroleum.
3. G. K. Sigworth, O. Rios, J. Howell and M. Kaufman: Trans. Am. Foundry Soc., 2004, paper 04-076.