Liyanagamage, A.2015-03-102015-03-101987Liyanagamage, A. (1986-1987). Keralas in Medieval Sri Lankan History: A Study of Two Contrasting Roles. Kalyani, Journal of Humanities & Social Sciences, University of Kelaniya, 05-06: 61-77.http://repository.kln.ac.lk/handle/123456789/5616enArticle