参考文献

Dandala, Ramesh; Mallela, Sambhu Prasad Sarma; Garimella, Narayan K.A.S.S.; Nandi, Sukumar; Buridipad, Sunil Kumar; Nangi, Gangadhar Bhima Shankar; Meenakshisunderam, Sivakumaran Patent: US2010/48899 A1, 2010 ; Location in patent: Page/Page column 11 ;