Jayasinghe, C.Jayasinghe, M.T.R.Illangasinghe, D.H.S.Gunawardane, P.K.Edirisinghe, E.A.N.S.2019-02-132019-02-132004Transactions - 2004 Volume I - PART B Technical Papers:p.203-209https://dl-iesl.nsf.gov.lk/handle/1/1160Article