1. Hedgepeth, J. M., NASA Rep. No. TND-882, 1961.
2. Zender, G. W. and Deaton, J. W., NASA Rep. No. TND-1609.
3. Hedgepeth, J. M. and Van Dyke, P., J. Comp. Mat., Vol. 1, p. 294, 1967.
4. Konish, H. T., Ph.D. Dissertation, The Carnegie Institute of Technology, Pittsburgh, 1973.
5. Beaumont, P. W. R. and Phillips, D. C., J. Comp. Mat., Vol. 6, p. 32, 1972.