参考文献

Lin, Nan-Horng; Li, Gaoquan; Przytulinska, Magdalenna K.; Sowin, Thomas J.; Sullivan, Gerard M.; Tao, Zhi-Fu; Tong, Yunsong; Wang, Le Patent: US2005/215556 A1, 2005 ; Location in patent: Page/Page column 59 ; US 20050215556 A1