1. See, for instance, “Dynamic Aspects of Structural Change in Liquids and Glasses,” Ed. C.A. Angell and M. Goldstein, Ann, NY, Acad. Sci., Vol. 484, NY Acad. Sci. NY (1986).
2. Birge, N. and Nagel S., Phys. Rev. Lett. 54, 2674 (1985).
3. Birge, N., Phys. Rev. B 34, 1641 (1986).
4. Jeong Y.H., Nagel S., and Bhattacharya S., Phys. Rev. A 34, 602 (1986).
5. Suga, H., and Seki, S., J. Non-Cryst. Solids, 16, 171, (1974).