Gunawardhana, D.S.R.E.S.; Ramanayaka, A.R.N.D.; Dompelage, P.T.(19th Conference on Postgraduate Research, International Postgraduate Research Conference 2018, Faculty of Graduate Studies,University of Kelaniya, Sri Lanka, 2018)
Wehigaldeniya, W.G.D.S.; Weerasingha, G.S.M.; Jayawardhana, A.; Ramanayaka, A.R.N.D.(19th Conference on Postgraduate Research, International Postgraduate Research Conference 2018, Faculty of Graduate Studies,University of Kelaniya, Sri Lanka, 2018)