参考文献

Haldar, Pranab; Golla, China Malakondaiah; Swapna, Akula; Kumar, Karri Vijaya; Jawlekar, Suhas; Tummala, Arjun Kumar; Patro, Deepali; Yarraguntla, Sesha Reddy; Ramakrishnan, Srividya; Chimala, Venkata Ramana Reddy Patent: US2011/250454 A1, 2011 ; Location in patent: Page/Page column 12 ;