参考文献

Heil, Markus; Meier, Heinrich; Naab, Paul; Voerste, Arnd; de Vry, Jean-Marie-Viktor; Denzer, Dirk; Mauler, Frank; Lustig, Klemens; Hinz, Volker; Allerheiligen, Swen Patent: US2003/232802 A1, 2003 ; Location in patent: Page 11 ;