1. R.J. Walter and W.T. Chandler: Report No. R-7780-1, 2, 3 (Final Report under NASA Contract NAS 8-19), Rocketdyne (Div. North American Rockwell Corp.), Canoga Park, CA, February 1969.
2. R. J. Walter and W. T. Chandler:Effect of Hydrogen on Behavior of Materials, A. W. Thompson and I. M. Bernstein, eds., TMS-AIME, 1976, p. 273.
3. H.G. Nelson:ibid., p. 603.
4. R.J. Walter and W. T. Chandler: Report No. CR-124410 (Final Report under NASA Contract NAS 8-25579), Rocketdyne, Canoga Park, CA, October 1973.
5. W. G. Clark, Jr.:Hydrogen in Metals, I. M. Bernstein and A. W. Thompson, eds., ASM, Metals Park, OH, 1974, pp. 149–64.