参考文献

Goble, Stephen D.; Yang, Lihu; Zhou, Changyou; Kothandaraman, Shankaran; Guiadeen, Deodialsingh; Butora, Gabor; Pastemak, Alexander; Mills, Sander G. Patent: US2007/117797 A1, 2007 ; Location in patent: Page/Page column 21 ; US 20070117797 A1