参考文献

Sagara, Takeshi; Otsuki, Sachie; Sunami, Satoshi; Sakamoto, Toshihiro; Niiyama, Kenji; Yamamoto, Fuyuki; Yoshizumi, Takashi; Furuyama, Hidetomo; Goto, Yasuhiro; Bamba, Makoto; Takahashi, Keiji; Hirai, Hiroshi; Nishibata, Toshihide Patent: US2007/254892 A1, 2007 ; Location in patent: Page/Page column 51 ; US 20070254892 A1