参考文献

Kitamura, Takahiro; Yamada, Hajime; Takemura, Shunji; Ashikawa, Masanori; Ishikawa, Tetsuya; Miyake, Yoshiharu; Kouketsu, Akiyasu; Sato, Seiichi; Ishiwata, Hiroyuki; Tabunoki, Yuichiro; Shibasaki, Manabu; Ozawa, Takatoshi; Shigemi, Ryota; Doi, Takeshi; Tamura, Masahiro Patent: US2011/237590 A1, 2011 ; Location in patent: Page/Page column 112 ; US 20110237590 A1