1. Energetics Inc.: Report No. DOE/EE-0229, US Department of Energy Office of Industrial Technologies, 2000, pp. 10–70.
2. Geological Survey, U.S.: U.S. Department of Interior—U.S. Geological Survey, 2011, p. 78.
3. J.C. Herman and V. Leroy: I&SM, 1996, Vol 23, no 12, pp. 35-43.
4. D.A. Melford, J. Iron Steel Inst., 1962, Vol. 200, pp. 290-99.
5. D.A. Melford, Philos. Trans. R. Soc. A, 1980, Vol. 295, No 1413, pp. 89-103.