1. Automotive Magazines, Data Compiled by Eric Boreczky, private communication.
2. Recent advances in ferrous powder metallurgy;Narasimhan;Adv. Perform. Mater.,1996
3. R.M. German, Power Metallurgy Science, Metal Powder Industry Federation, Princeton, NJ, 1994.
4. Enhanced sintering treatments for ferrous powders;German;Int. Met. Rev.,1984
5. MPIF Standard 35, Published by Metal Powder Industries Federation, Princeton, NJ.