1. Robinson, A.H., Barton, J.P., Trans. Amer. Nuc. Soc. 15 (1972) 140.
2. Bossi, R.H., thesis, Oregon State University (1976).
3. Barton, J.P., Bossi, R.H., Robinson, A.H., Ch. 14, Proc. Flash Radiography Symposium (Bryant, L.E., Jr., Ed.) ASNT (1977).
4. Barton, J.P., J. of Mat. 7 1 (1972) 18.
5. Spowart, A.R., Brit. J. Nondes. Test. 3 (1962) 2.