- Samarakoon, H. H., and C. Shanmugan. 1967. Levels of aldrin, diedrin and heptachlor for shot-hole borer control in new clearings at Balangoda Group, Balangoda. 86.
- Samarakoon, H. H., and C. Shanmungam. 1967. Levels of aldrin, dieldrin and heptachlor for shot-hole borer control in new clearings at Balangoda Group, Balangoda . Tea Research Institute of Ceylon, Annual Report 1966:86.