1. Orr, J and Burton, D, Experience in Data Collection Assessment for Materials Standards, Paper 5.2, ECSC Information Day - The Manufacture and Properties of Steel 91 for the Power Plant and Process Industries, 1992
2. Ham, W.M. & Greenwell B.S., Paper 4.1, ibid
3. van Wortel, J.C., Etienne, C.F. & Arav, F., Paper 4.2, ibid
4. Coussement, C., De Witte, M. & De Backer, T., Paper 4.3, ibid
5. Roberts, B.W., Hackett, C.D. & Canonico D.A., Thick-Section Welding of Modified 9Cr-iMo (P-91) Steel, EPRI TR-101394 Interim Report 1992.