参考文献

Aicher, Thomas Daniel; Anzeveno, Peter Biagio; Li, Renhua; Krasutsky, Alexei Pavlovych; Mabry, Thomas Edward; Saeed, Ashraf; Snyder, Nancy June; Stephenson, Gregory Alan; Tian, Hongqi; Wallace, Owen Brendan; Winneroski, JR., Leonard Larry; Xu, Yanping Patent: US2009/111800 A1, 2009 ; Location in patent: Page/Page column 39 ; US 20090111800 A1