参考文献

Dominique, Romyr; Fotouhi, Nader; Gillespie, Paul; Goodnow, Robert Alan; Kowalczyk, Agnieszka; Qiao, Qi; Sidduri, Achyutharao Patent: US2009/54466 A1, 2009 ; Location in patent: Page/Page column 94-95 ; US 20090054466 A1