1. 1) Otomo, S.: Nippon Gomu Kyokaishi, 63, 605 (1990)
2. 2) Otomo, S.: Nippon Gomu Kyokaishi, 68, 335 (1995)
3. 3) Gomu Gijutsu Forum Ed. : “Forum3 Gomu Kogyo niokeru Gijutsu Yosoku -Jidosha Tire wo Chushin toshite”, p.146-156, Posty, Tokyo (1990)
4. 4) Gomu Gijutsu Forum Ed. : “Forum4 Tokushu Elastomer no Mirai Tenkai wo saguru”, p.115-127, Gomutimes, Tokyo (1992)
5. 5) Tan, E. H.; Wolf, S.: Rubber World, 199 (3), 31 (1988)