1. Z. Nishiyama, Martensitic Transformations (Academic, New York, 1978).
2. A. Vanossi, K. Ø. Rasmussen, A. R. Bishop, B. A. Malomed, and V. Bortolani, Phys. Rev. E, 62, 7353 (2000).
3. The two-dimensional version of Eq.(l) is, where the parameters have the interpretation given in connection with Eq. (1).
4. V. I. Arnold, Mathematical Methods of Classical Mechanics, (Springer, New York, 1989).
5. M. Abramowitz and I. A. Stegun, Handbook of mathematical functions with formulas, graphs, and mathematical tables, (U.S. Govt. Print. Off., Washington, D.C., 1964).