参考文献

COUNCIL OF SCIENTIFIC and INDUSTRIAL RESEARCH; Sarma, Jadab Chandra; Bora, Dilip Chandra; Rao, Paruchuri Gangadhar; Ghosh, Balaram; Balwani, Sakshi Patent: US2013/131350 A1, 2013 ; Location in patent: Paragraph 0091; 0127; 0128; 0129; 0130; 0131 ;