1. 1) Y. Yakita, N. Sato, S. Nakagawa, H. Shimizu and H. Tachibana: CAMP-ISIJ, 8(1995), 449.
2. 2) H. Tachibana, S. Nakagawa, Y. Buei, Y. Yakita and A. Okada: CAMP-ISIJ, 21(2008), 1141, CD-ROM.
3. 3) S. Nakagawa and H. Tachibana: Trans. Soc. Instrum. Control Eng., 45(2009), 233.
4. 4) T. Honda, S. Nakagawa, C. Uematsu, H. Tachibana, Y. Buei and K. Sakagami: Proc. ICROS-SICE Int. Joint Conf. 2009 (ICCAS-SICE 2009), The Society of Instrument and Control Engineers, Tokyo, (2009), 2774.
5. 5) T. Honda, C. Uematsu, H. Tachibana, S. Nakagawa, Y. Buei, K. Sakagami, K. Kimura and H. Takahashi: Tetsu-to-Hagané, 96(2010), 592.