参考文献

Malakondaiah, Golla China; Gurav; Reddy, Lekkala Amarnath; Babu, Karrothu Srihari; Bhaskar, Bolugoddu Vijaya; Reddy, Padi Pratap; Bhattacharya, Apurba; Anand, Ramasamy Vijaya Synthetic Communications, 2008 , vol. 38, # 11 p. 1737 - 1744