参考文献

Gavai, Ashvinikumar V.; Han, Wen-Ching; Chen, Ping; Ruediger, Edward H.; Mastalerz, Harold; Fink, Brian E.; Norris, Derek J. Patent: US2005/197339 A1, 2005 ; Location in patent: Page/Page column 12 ; US 20050197339 A1