1. La Rocca, E.W., and Pearson, J., Rev. Sci. Inst., 29 848 (1958).
2. Ezra, A.A., Principles of Explosive Metalworking, “Industrial Newspapers Ltd.”, London, 1973.
3. Pruemmer, R.A., and Zeigler, G., P.M. Int. 1, 11 (1977).
4. Lennon, C.R.A., Bhalla, A.K., and Williams, J.D., P.M. 21, 1978.
5. Leonard, R.W., Laber, D. and Linse, V.D., 2nd H.E.B.F. Conf., Denver, 1969.