1. S.S. Yılmaz, Effect on physical and mechanical properties of surface hardening treatments of ferrous based PM parts, PhD thesis, Celal Bayar University, Manisa, Turkey (in Turkish), 2004.
2. Low alloy P/M steels;Douib;Powder Metallurgy,1989
3. Heat treatment;Sarıtaş;The Metal Society,1981
4. Shot Peening: theory and applications;Varol;Engineering and Machine,1992