Fernando, S.D.; Goonethilleke, H.; Weerasena, K.H.; Kuruppuarachchi, N.D.; Tilakaratne, D.; de Silva, D.; Wickremasinghe, A.R.(SEAMEO Regional Tropical Medicine and Public Health Project, 2001)
Fernando, S.D.; Gunawardena, D.M.; Bandara, M.R.; de Silva, D.; Carter, R.; Mendis, K.N.; Wickremasinghe, A.R.(American Society of Tropical Medicine and Hygiene, 2003)