Wijegunawardana, N.D.A.D.; Gunawardene, Y.I.N.S.; Manamperi, A.; Hapuarachchi, H.A.C.; Bandara, K.B.A.T.; Abeyewickreme, W.(Sri Lanka Association for the Advancement of Science, 2008)
Wijegunawardana, N.D.A.D.; Gunawardene, Y.I.N.S.; Manamperi, A.; Senarathne, H.; Abeyewickreme, W.(SEAMEO Regional Tropical Medicine and Public Health Project, 2012)