1. R. C. Owen, Y. W. Mai, and C. L. Chow, IJF 12 (1976) 3?17.
2. Y. W. Mai, A. G. Atkins, and R. M. Caddell, IJF 12 (1976) 391?407.
3. Damage Tolerant Design Handbook, MCIC-HB-01, Metals and Ceramics Information Center, Battelle Columbus Laboratories (1973).
4. D. L. Jones, H. Liebowitz, and J. Eftis, EFM 6 (1974) 639?652.
5. R. L. Moore, G. E. Nordmark, and J. G. Kaufman, EFM 4 (1972) 51?63.