参考文献

Biagetti, Matteo; Contini, Stefania Anna; Genski, Thorsten; Guery, Sebastien; Leslie, Colin Philip; Mazzali, Angelica; Pizzi, Domenica Antonia; Sabbatini, Fabio Maria; Seri, Catia Patent: US2009/203705 A1, 2009 ; Location in patent: Page/Page column 29 ; US 20090203705 A1