Jinadasa M P K; Rajapaksha C(The Issues and Challenges of the 21st Century,10th Anniversary international Symposium. Sri Lanka, 4th-8th July 2006. Sabaragamuwa University of Sri Lanka. Kelaniya, Sri Lanka, 2006)
Jinadasa M P K; Rajapaksha C(?Modeling The Issues and Challenges Towards Sustainable Development?,2nd international Symposium. 8th-12th July 2008. Sabaragamuwa University of Sri Lanka. Kelaniya, Sri Lanka, 2006)