Ramachandran, P. Veeraraghavan; Chandra, J. Subash; Prabhudas, Bodhuri; Pratihar, Debarshi; Reddy, M. Venkat Ram Organic and Biomolecular Chemistry, 2005, vol. 3, # 20 p. 3812 - 3824 doi: 10.1039/b508001k