参考文献

Illig, Carl R.; Ballentine, Shelley K.; Chen, Jinsheng; Meegalla, Sanath K.; Rudolph, M. Jonathan; Wall, Mark J.; Wilson, Kenneth J.; Desjarlais, Renee L.; Manthey, Carl L.; Molloy, Christopher J. Patent: US2008/51402 A1, 2008 ; Location in patent: Page/Page column 60 ; US 20080051402 A1