1. J. A. ZUKAS, T. NICHOLAS, H. SWIFT, L. B. GRESZCZUK and D. R. CURRAN (editors), in ?Impact Dynamics? (Wiley, New York, 1982) p 155.
2. R. KINSLOW (editor), in ?High-velocity Impact Phenomena? (Academic Press, New York, 1970) p. 419.
3. H. MATSUMOTO, T. SHIRANITA, S. DOHI and S. KAGEYAME,J. Jpn. Soc. Strength Fracture Mater. 24 (1989) 11 (in Japanese).
4. M. E. BACKMAN,J. Appl. Phys. 30 (1959) 1397.
5. T. A. C. STOCK and K. R. L. THOMPSON,Met. Trans. 1 (1970) 219.