1. 1) Yoshida, T.: Dai 36 kai Gomu Gijyutu Symposium Text; Gomuneri no Cost Down to Hinshitsu, Nippon Gomu Kyokai Kenkyubukai, 1 (1994)
2. 3) “Gomu Shikenho (3rd ed.) ”, Nippon Gomu Kyokai, 159 (2006)
3. 4) Kogusuri, J.: Dai 135 kai Gomu Gijyutu Symposium “Gomuneri no Kiso to Oyo II- Gomuneri no Shouraizo -”, “Gomuneri Jyotai no Hyoukahouhou”, Nippon Gomu Kyokai, 41 (2007)
4. 5) Toh, M.; Gondoh, T.; Mori, T.; Satoh, T.; Kuratsu, M.; Mishima, M.: Full Texts of International Rubber Conference, Malaysia, p.1041 (1997)