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2. M. Smialowski:Hydrogen in Steel, Pergamon Press, New York, 1962, 452 pp.
3. J. D. Fast:Interaction of Metals and Gases. I. Thermodynamics, 302 pp., Academic Press, Inc., New York, 1965.
4. E. E. Fletcher and A. R. Elsea:Hydrogen Movement in Steel Entry, Diffusion, and Elimination, DMIC, Battelle Mem. Instr., DMIC Report 219, June 30, 1965.
5. R. B. McLellan:Phase Stability in Metals and Alloys, pp. 393–417, McGraw-Hill, Inc., New York, 1967.