1. Influence of Metallurgy on Machinability of Steel;B. Laszlo,1977
2. K. Uesugi, M. Araki, V. Yamamato, T. Nishimura, S. Okano, K. Mine, Y. Shinjo, S. Omori, Y. Yada:Iron and Steel Japan, Vol. 68, No. 2 (1982), P. A85.
3. V. A. Tipnis, and R. A. Joseph:Trans, ASME, B. Vol. 93, No. 2 (1971), p. 559.
4. S. Katayama, T. Imai, and S. Suzuki: Tetsu-to-Hagane,Vol. 71 (1985), p. S530.
5. S. Izumi, Y. Koyasu, S. Ohtani, T. Ohsasa, Y. Tanefuji, K. Ishiyama, and K. Sugawara:Tetsu-to-Hagane. Vol. 69 (1983), P. S515.