Yadav, Jhillu S.; Mallikarjuna Reddy, Nimmakayala; Venkateswar Rao; Rahman, Md. Ataur; Prasad, Attaluri R. Helvetica Chimica Acta, 2012, vol. 95, # 2 p. 227 - 234 doi: 10.1002/hlca.201100190