1. R. Kikuchi, Prog. Theor. Phys. Suppl. No. 35, 1 (1966).
2. L. Q. Chen, Y. Z. Wang, and A. G. Khachaturyan, Statics and Dynamics of Alloy Phase Transformations Proc. of NATO ASI, Eds. A. Gonis and P. E. A. Turchi (New York: Plenum, 1994), p. 587.
3. L. Q. Chen, Mod. Phys. Lett. 7, 1857 (1993).
4. L. Q. Chen, Phys. Rev. B 49, 3791 (1994).
5. V. G. Vaks, S. V. Beiden, and V. Yu. Dobretsov, JETP Lett. 61, 68 (1995).