参考文献

Schulze, Volker Klaus; Eis, Knut; Wortmann, Lars; Kosemund, Dirk; Prien, Olaf; Siemeister, Gerhard; Hess-Stumpp, Holger; Eberspaecher, Uwe; Brittain, Dominic E.A.; Islam, Imadul Patent: US2007/15759 A1, 2007 ; Location in patent: Page/Page column 43-44 ; US 20070015759 A1