Karunaratne, H. D. (1990) Impact of Structural Changes in Imports on Balance of Payments in Sri Lanka, Unpublished thesis submitted in partial fulfillment of the requirement of the
Bachelor of Arts Special Degree in Economics, University of Sri Jayewardenepura, Sri Lanka.[Main Supervisor: Prof. S.M.S. Sathkumara, Sub-Supervisor: Prof. P. Wilson]