参考文献

Maddaford, Shawn; Ramnauth, Jailall; Rakhit, Suman; Patman, Joanne; Renton, Paul; Annedi, Subhash C. Patent: US2006/258721 A1, 2006 ; Location in patent: Page/Page column 49-51; 56 ; US 20060258721 A1