M.K.D.K. Piyaratne, N.G.J. Dias and N.S.B.M. Attapattu
Information Technology Journal 11 ( 7 ): 788 - 793 , 2012
R.P.T.H. Gunasekara, M.C. Wijegunasekara and N.G.J. Dias
Journal of Engineering and Applied Sciences 9 ( 10 ): 441 - 446 , 2014