1. 1) Nippon Gomu Kyokai Ed.: “Gomu Kogyo Binran（4th ed.）”, Nippon Gomu Kyokai, Tokyo, Chapter 1 (1994)
2. 2) Nippon Gomu Kyokai Ed.; “Gomu Gijutsu no Kiso”, Nippon Gomu Kyokai, Tokyo, Chapter 1 (1983)
3. 3) Coran, A. Y.: “Vulcanization” in “Science and Technology of Rubber”, Mark, J. E.; Erman, B.; Eirich, F. R. Ed. (1994)
4. 4) Barnard, D.; Lewis, P. M.: “Oxidative Aging” in “Natural Rubber Science and Technology”, Oxford University Press, Oxford (1988)
5. 5) Watson, W. F.: “Mechanochemical Reactions” in “Chemical Reactions of Polymers”, Fettes, E. M. Ed., Interscience, New York, Chapter XIV (1964)