Volume 4, Issue 4, December 2014, Pages 809-815
K.P. Wickramasinghe; N.S.B.M. Atapattu; R.T. Seresinhe
Volume 3, Issue 1, March 2013, Pages 153-160
N.S.B.M. Atapattu; H.S. Sudusinghe
Volume 3, Issue 1, March 2013, Pages 177-183
N.S.B.M. Atapattu; A.P.S. Mendis