1. B. G. Bergman and D. P. Shoemaker: Journal of Chemical Physics (1951) 19, p. 515.
2. A. H. Sully: Journal Inst. Metals (1951–1952) 80, p. 173.
3. P. A. Beck: Trans. AIME (1952) 194, p. 420; Journal of Metals (April 1952). See also: Journal Inst. Metals (1951–1952) 80, p. 694.
4. S. Rideout et al.: Trans. AIME (1951) 191, p. 872; Journal of Metals (October 1951).
5. D. K. Das, S. P. Rideout, and P. A. Beck: Trans. AIME (1952) 194, p. 1071; Journal of Metals (October 1952).