1. H. J. Engell, A. v. Keitz, and G. Sauthoff, in Advanced Structural and Functional Materials, Proceedings of an International Seminar, W. G. J. Bunk, ed. (Springer, Berlin, (1991).
2. K. Girgis, in Physical Metallurgy, R. W. Cahn and P. Haasen, eds. (Elsevier, Amsterdam, 1983), Chap. 5.
3. A. Lawley, in Intermetallic Compounds, J. H. Westbrook, ed. (Wiley, New York, (1967), Chap. 24.
4. L. Guillet and R. Le Roux, in Intermetallic Compounds, J. H. Westbrook, ed. (Wiley, New York, (1967), Chap. 23.
5. B. W. Roberts, in Intermetallic Compounds, J. H. Westbrook, ed. (Wiley, New York, (1967), Chap. 29.