参考文献

Elati, Chandrashekar R.; Kolla, Naveenkumar; Chalamala, Subrahmanyeswara Rao; Vankawala, Pravinchandra J.; Sundaram, Venkataraman; Vurimidi, Himabindu; Mathad, Vijayavitthal T. Synthetic Communications, 2006 , vol. 36, # 2 p. 169 - 174