1. P. Gray: “Stress Corrosion Cracking of Rockbolts,”Coal 98 Conference, Wollongong, Australia, Feb 1998.
2. D.M. Shutter, W. Geary, and P.F. Heyes: “Engineering Performance of Mining Rockbolts,”29th International Conference on Safety in Mines Research Institutes, Szczyrk, Poland, 8–11 Oct 2001.
3. A. Crosky, M. Fabjanczyk, P. Gray, B. Hebblewhite, and B. Smith: “Premature Rock Bolt Failure,” ACARP Project C8008 Final Report, Australian Coal Association Research Program, Aug 2002.
4. Australian Standard AS1544.2-1989, “Methods for Impact Tests on Metals, Charpy V-Notch,” Standards Australia, 1989.