参考文献

Vellanki, Siva Rama Prasad; Sahu, Arabinda; Katukuri, Aravind Kumar; Vanama, Vikram; Kothari, Satishbabu; Ponnekanti, Venkata Suryanarayana; Datta, Debashish Patent: US2012/251826 A1, 2012 ; Location in patent: Page/Page column 10 ;