1. AFML-TR;F.W. Wood,1969
2. Titanium Rotating Components Review Team Report, Federal Aviation Administration, Washington, DC, Dec. 14, 1990.
3. Damage Tolerance Concepts for Critical Engine Components, AGARD Conf. Proc. No. 393, Advisory Group for Aerospace Research and Development, NATO, Neuilly-Sur-Seine, France, 1985.
4. J.C. Newman, Jr.: Contribution from NASA Langley Research Center on the AGARD Engine Disc Programme, private correspondence, NASA Langley Research Center, Langley, VA, 1994.
5. AFWAL Report WL-TR;P.G. Roth,1992