参考文献

Galemmo, JR., Robert; Holland, Richard; Hum, Gabriel; Pajouhesh, Hossein; Chahal, Navjot; Seid-Bagherzadeh, Mehran; Girard, Amy Patent: US2009/270394 A1, 2009 ; Location in patent: Page/Page column 9 ; US 20090270394 A1