参考文献

Srihari, Ejjirothu; Kumar, Gangala Siva; Kumar, Chebolu Naga Sesha Sai Pavan; Seth, Ratnesh Kumar; Biswas, Sukla; Sridhar, Balasubramanian; Rao, Vaidya Jayathirtha Heterocyclic Communications, 2011 , vol. 17, # 3-4 p. 111 - 119