Alluraiah, Gurrala; Sreenivasulu, Reddymasu; Sreenivasa Murthy, Indraganti; Ramesh Raju, Rudraraju Monatshefte fur Chemie, 2014, vol. 145, # 12 p. 2019 - 2024 doi: 10.1007/s00706-014-1272-z