1. 1) S. Omori, Y. Hashimoto and K. Koyama: "Standard Gibbs Energy of Formation of MoB by EMF Measurement", Kouon Gakkai-shi, 7 (1981) 204-208.
2. 2) S. Omori, Y. Hashimoto and K. Koyama: "Standard Free Energy of Formation of Mo2B and Mo3Si by EMF", Jpn. Inst. Met., 45 (1981) 1107-1111.
3. 3) S. Omori, Y. Hashimoto and K. Koyama: "Standard Free Energies of Formation of W2B and WB by EMF Measurement", J. Jpn. Inst. Met., 6 (1982) 760-763.
4. 4) K. Koyama, Y. Hashimoto, K. Suzuki and H. Matsuo: "Determination of Standard Gibbs Free Energy of Formation of NiW2B2 and Activity of Ni-W Binary System by EMF Measurement", J. Jpn. Soc. Powder Powder Metallurgy, 36 (1986) 926-932.
5. 5) K. Koyama, Y. Hashimoto, K. Suzuki and H. Matsuo: "Determination of Standard Gibbs Free Energy of Formation of NiMo2B2 and Activity of Ni-Mo Binary System by EMF Measurement", J. Jpn. Inst. Met., 53 (1989) 183-188.