1. Prasad RN, Agrawal A (2006) J Indian Chem Soc 83:75
2. Prasad RN, Agrawal M, George R (2005) J Indian Chem Soc 82:445
3. Hussain ST, Ahmad H, Atta MA, Afzal M, Saleem M (1998) J Trace Microprobe Tech 16:139
4. Fujinaga K, Sakaguchi Y, Tsuruhara T, Seike Y, Okumura M (2001) Solvent Extr Res Dev 8:144
5. Xiong Z-Y, Liu L-J (2005) Acta Crystallogr E61:m863