1. K. M. Kulkarni, N. M. Parikh, and T. Watmough:J. Inst. Metals, 1972, vol. 100, p. 146.
2. C. C. Chen, W. H. Couts, Jr., C. P. Gure, and S. C. Jain: AFML Phase I Report IR-128-4 (II), Contract AF33615-74C-5011, April 1975.
3. K. M. Kulkarni, T. Watmough, D. Stawarz, and N. M. Parikh: Technical Report AFML-TR-74-138, September 1974.
4. W. D. Spiegelberg and F. N. Lake:Quart. Eng. Reports, Army Weapons Command, Contract DAAF-03-73-C-009, January 1974.
5. C. C. Chen: Unpublished work at Wyman-Gordon Company, (Report RD-75-105), Massachusetts, 1975.