Sharma, Gangavaram V. M.; Reddy, Kodeti Srinivas; Basha, Shaik Jeelani; Reddy, Kondreddi Ravinder; Sarma, Akella V. S. Organic and Biomolecular Chemistry, 2011, vol. 9, # 23 p. 8102 - 8111 doi: 10.1039/c1ob06279d