Jayathilaka, P.2016-03-092016-03-092016Jayathilaka, P. 2016. Anxiety disorders: causes and mechanisms as in biological, behavioral and psychoanalytic perspectives. Felicitation volume of Prof. Kulasena Widanagamage, Faculty of Social Sciences, University of Kelaniya, Kelaniya. pp 270-279.http://repository.kln.ac.lk/handle/123456789/12107enAnxiety disorders: causes and mechanisms as in biological, behavioral and psychoanalytic perspectivesArticle