参考文献

Cociorva, Oana; Li, Bei; Szardenings, Katrin; Fukuda, Yasumichi; Nomura, Masahiro; Seto, Shigeki; Yumoto, Kazuhiro; Okada, Kyoko; Nakamura, Ayako Patent: US2007/254866 A1, 2007 ; Location in patent: Page/Page column 75 ;