参考文献

Sharma, Lalima; Sattigeri, Jitendra A.; Kumar, Narest; Yadav, Ajay; Momim, Rijwan; Ahmed, Shahadat; Cliffe, Ian A.; Bhatnagar, Pradip Kumar; Ghosh, Sanjay; Raj, V. Samuel; Upadhyay, Dilip J. Patent: US2012/108565 A1, 2012 ;