Itoh, M.; Weerasooriya, M.V.; Qiu, G.; Gunawardena, N.K.; Anantaphruti, M.T.; Tesana, S.; Rattanaxay, P.; Fujimaki, Y.; Kimura, E.(American Society of Tropical Medicine and Hygiene, 2001)
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)