Perera, A.V.K.; Kumara, P.S.; Damayanthi, B.W.R.(IRCHSS-2018 and Faculty of Humanities and Social Sciences, University of Sri Jayewardenepura, 2018-11)
Ratnayake, J.C.; Ratnayake, G.; Seneviratne, B.H.(IRCHSS-2018 and Faculty of Humanities and Social Sciences, University of Sri Jayewardenepura, 2018-11)