Amarasiri, L.; Pathmeswaran, A.; Ranasinha, C.D.; de Silva, H.J.(American Gastroenterological Association(AGA) Institute, Published by Elsevier Inc., 2008)
de Silva, A.P.; Amarasiri, L.; Kottahachchi, D.C.; Sabhapathige, R.D.; Dassanayake, A.S.; de Silva, H.J.(American Gastroenterological Association(AGA) Institute, Published by Elsevier Inc., 2006)
Kasturiratne, A.; Pathmeswaran, A.; Fonseka, M.M.D.; Lalloo, D.G.; Brooker, S.; de Silva, H.J.(SEAMEO Regional Tropical Medicine and Public Health Project, 2005)