Kolambage, S.H.; Jayasiri, M.M.J.G.C.N.; Gajanayake, P.; Bandaranayaka, D.T.; Wijethunga, A.; Manatunga, D.C.; Abeynayaka, A.(The Open university of Sri Lanka, 2024)
Gunawardena, A.R.; Fernando, T.T.; Jayasekara, S.; Maduwanthi, R.G.I.; Uthpala, K.P.S.; Dayananda, H.N.; Prasangika, L.G.N.(The Open university of Sri Lanka, 2024)