Bandara, B.M.R.Hewage, C.M.Karunaratne, V.Wijesundera, D.S.A.2016-06-202016-06-201987Proceedings of the 43rd Annual Sessions of the Sri Lanka Association for the Advancement of Science:p.233https://dl.nsf.gov.lk/handle/1/23280ChemistryARG/86/C/004FR 0264, FR 0837T