1. 1) M. Hasegawa, et al.: Sutenresukou Binran, THE NIKKAN KOGYO SHINBUN, LTD., (1973) 538.
2. 2) K. Takagi: "Development of High Strength Complex Boride Base Hard Materials Produced by Reaction Boronizing Sintering", J. Jpn. Soc. Powder Powder Metallurgy, 45 (1998) 507-514.
3. 3) M. Komai, Y. Yamasaki, K. Takagi: "Effect of Cr Content on Properties of (Mo, Ni) Boride Base Hard Alloys", J. Jpn. Inst. Metals, 57 (1993) 813-820.
4. 4) Y. Yamasaki, M. Nishi, K. Takagi: "Effect of Mo Content on Microstructures and Mechanical Properties of Mn and V Containing Mo2NiB2 Base Hard Alloys", J. Jpn. Soc. Powder Powder Metallurgy, 49 (2002) 312-317.
5. 5) G. Zhang, M. Morishita, M. Inada, K. Koyama: "Effect of Cu on the Corrosion Resistance of a NiMo2B2 - Dispersed Ni - Based Alloy", J. Jpn. Inst. Metals, 63 (1999) 1255-1261.