1. R.M. German, Powder Metallurgy Science, Metal Powder Industries Federation, Princeton, New Jersey, (1984).
2. P.J. James, Powder Metallurgy Int, 4 (1972), 193
3. G.V. Samsonov, Electronic Theory of Sintering, Naukova Dumka, Kiev (1974).
4. E.Y. Gutmanas, Powder Metallurgy Int., 12, 4 (1980) 178
5. I.P. Arsentyeva and M.M. Ristić, Proceedings of the VI World Round Table Conference on Sintering, Herceg-Novi (Edited by G.C. Kuczynski, D.P. Uskokovic, H. Palmour III, M.M. Ristic), Plenum Press, New York (1987).