Gunathilaka, P.A.D.H.N.; Ranathunga, R.M.T.B.; Udayanga, N.W.B.A.L.; Abeyewickreme, W.(Faculty of Graduate Studies, University of Kelaniya, Sri Lanka, 2016)
Mamunuwa, N.; Jayamanne, S.; Coombes, J.; de Silva, A.; Lynch, C.; Wickramasinghe, D.(Faculty of Graduate Studies, University of Kelaniya, Sri Lanka, 2016)