Wijayarathna, W.K.M.; Amarakoon, A.A.C.N.; Dushmantha, H.M.K.G.; Gunawardhana, A.G.K.C.; Madhusanka, G.A.D.J.(Rajarata University of Sri Lanka, 2018-06-18)
Hatharasinghe, P.M.Sakuni Yashoda; Wanigathunga, K.Chandima; Bandara, N.M.Chandima; Dissanayake, S.A.Uma Savindini(Rajarata University of Sri Lanka, 2017-02-17)