参考文献

Takiguchi, Takao; Tsuboyama, Akira; Mizutani, Hidemasa; Okada, Shinjiro; Miura, Seishi; Moriyama, Takashi; Igawa, Satoshi; Kamatani, Jun; Furugori, Manabu Patent: US2002/64681 A1, 2002 ;