Lambu, Mallikharjuna Rao; Hussain, Altaf; Sharma, Deepak K.; Yousuf, Syed Khalid; Singh, Baldev; Tripathi, Anil. K.; Mukherjee, Debaraj RSC Advances, 2014, vol. 4, # 22 p. 11023 - 11028 doi: 10.1039/c3ra46796a