参考文献

SUZUKI, Nobuyasu; Nihei, Yukio; Ichinose, Hidehiro; Tanaka, Hideyuki; Yasa, Noriko; Hatanaka, Toshihiro; Masuzawa, Yoko; Nakanishi, Eiji; Kondo, Nobuo Patent: US2007/105899 A1, 2007 ; Location in patent: Page/Page column 70 ;