1. B.M. Cina: US Patent 3856584, 1974.
2. B. Cina and B. Ranish: Aluminum Industrial Products, 1974, pp. 1–29.
3. W. Wallace, J. C. Beddoes, and M. C. DeMalherbe: Canadian Aeronautics and Space Journal, 1978, vol. 27, no. 3, pp. 222-232.
4. K. Rajan, W. Wallace, and J. C. Beddoes: J. Mater. Sci., 1982, vol. 17, pp. 2817-2824.
5. N. C. Danh, K. Rajan, and W. Wallace: Metall. Trans. A, 1983, vol. 14A, no. 9, pp. 1843-1850.