1. W. L. Mudge, Jr.: Zirconium and Zirconium Alloys, (1953) p. 730. Cleveland. ASM.
2. C. M. Schwartz and M. W. Mallett: Trans. ASM (1954) 46, pp. 640–654.
3. M. N. A. Hall, S. L. H. Martin, and A. L. G. Rees: Trans. Faraday Society (1945) 41, p. 306.
4. E. A. Gulbransen: Review article to be published. Zirconium and Zirconium Alloys. Sponsored by United States Atomic Energy Commission.
5. D. P. Smith: Hydrogen in Metals. (1948) Chicago. The University of Chicago Press.