1. 2) “Jidousha-Gijyutu-Kai,” Jidousha no Tribology, Yokendo (1994) p. 34 [in Japanese].
2. 3) Yamamoto, Y., “Tribology,” Rikogaku-Sha (1998) pp. 226-227 [in Japanese].
3. 5) Hsu, S.M., Nagarajan, V.S. and Liu, H., “Advanced Ceramics for Structural and Tribological Applications,” Ed. by Hawthorne, H.M. and Troczynski, T., The Canadian Institute of Mining, Metallurgy and Petroleum (1995) pp. 7-21.