1. N. Narutaki, A. Murakosi (1981) Machinability of Sintered Steels. J. of Japan Soc. of Precision Eng. 47(12) p.1516
2. Y. Tanaka., H Tsuwa, G. Omori (1964) Study on Cutting of Sintered Iron Parts(lst Report). J. of Japan Soc. of Precision Eng. 31(1) p.100
3. K. Yamaguchi, T. Nakamoto, T. Mizuno, S. Daido (1987) The development of Free Machining Sintered Metal Including Non-metal Additives(1st Report, Sintered Iron). J. of Japan Soc. of Mechanical Eng. C,53(485) p.235
4. N. Narutaki, Y. Yamane, H Usuki, K. Shimada, Y. Takeda (1995) Machinability and its Improvement of High Strength Sintered Alloy Steels. J. of Japan Soc. of Precision Eng. 61(2) p.238
5. K. Uehara, S. Yamaguchi (1981) Machinability Improvement of Sintered Stainless Steel. Proc. of Japan Soc. of Precision Eng. Autumn Conf. p.239