Ferdinando, I.Liyanage, S.2015-05-212015-05-212008Ferdinando, Indika and Liyanage, Saumya, 2008. කේවල සුරතාන්තයට ප්‍රතිපක්ෂව බහු සුරතාන්ත, Proceedings of the Annual Research Symposium 2008, Faculty of Graduate Studies, University of Kelaniya, pp 17.http://repository.kln.ac.lk/handle/123456789/7625enArticle