Jayasinghe, U.L.B.Karunaratne, V.Wannigama, G.P.2016-06-202016-06-201990Proceedings of the 46th Annual Sessions of the Sri Lanka Association for the Advancement of Science:p.145https://dl.nsf.gov.lk/handle/1/23291ChemistryARG/84/C/006FR 0450