1. Referans1 German R., Powder Metallurgy Science, Metal Powder Industries Federation, Princeton, NJ p.2, 1984.
2. Referans2 Salak A., Ferrous Powder Metallurgy, Cambridge International Science Publishing, Cambridge p.1, 1997.
3. Referans3 Hadrboletz A., Weiss B, Int Mater Rev 42:1, 1997.
4. Referans4 Salak, A.. Ferrous Powder Metallurgy. Cambridge, UK: Cambridge International Science Publishing, 1987.
5. Referans5 German, R.M., “Powder Metallurgy of Iron and Steel”, New York: John Wiley & Sons Inc., 1998.