1. R. P. Reed, P. T. Simon, N. J. McColskey, et al., “Aluminum alloys for ALS cryogenic tanks: Comparative measurements of cryogenic mechanical properties of Al – Li alloys and alloy 2219,” in: Philips Laboratory, TR-91-3073, CA, USA (1991).
2. J. Sessler and V. Weiss, “Aluminum alloy 221,” in: Materials Data Handbook, CR-74554, NASA, USA (1966).
3. Elwin L. Rooy, “Introduction to aluminium and aluminium alloys,” in: Properties and Selection Nonferrous Alloys and Special Purpose Materials. Metals Handbook, The Materials Information Society, ASM International, USA (1990), Vol. 2, pp. 3 – 14.
4. “Aluminum and aluminum alloys,” in: J. R. Davis (ed.), ASM Specialty Handbook, ASM International, Materials Park Ohio, USA (1994), pp. 290 – 315.
5. Jae-Ho Jang, Dae-Geun Nam, Yong-Ho Park, and Ik-Min Park, “Effect of solution treatment and artificial ageing on microstructure and mechanical properties of Al – Cu alloy,” Trans. Nonferrous Met. Soc. China, 23, 631 – 635 (2013).