1. Polyurethane Elastomers
2. Fuji-Keizai Tokyo Marketing Division Ed. “2015 Nen Kokinou Erasutoma · Oyoseihin Shijo No Tenkai To Gurobaru Senryaku”, Fuji-Keizai. Tokyo, p. 99 (2015).
3. Fuji-Keizai, Tokyo Marketing Division Ed. “2015, Kokinou Erasutoma · Oyoseihin Shijo No Tenkai To Gurobaru Senryaku”, Fuji-Keizai, Tokyo. p. 230 (2015).