参考文献

Agrawal, Sudeep Kumar; Bhat, Pratibha Kuldeep; Gudipati, Srinivasulu; Katkam, Srinivas; Komati, Satyanarayana; Bhushan, Indu; Mohan, Mailatur Sivaraman Patent: US2008/51449 A1, 2008 ; Location in patent: Page/Page column 5 ;