Senarathne, E.M.N.S.; Edirisinghe, E.M.R.K.B.(International Postgraduate Research Conference 2019, Faculty of Graduate Studies, University of Kelaniya, Sri Lanka, 2019)
Botheju, W.S.M.; Liyanage, J.A.(International Postgraduate Research Conference 2019, Faculty of Graduate Studies, University of Kelaniya, Sri Lanka, 2019)