- Radhakrishnan, B., P. K. Ramaiah, and P. K. Bhat. 1987. Methodology to estimate yield loss in coffee due to insect pests. Journal of Coffee Research 1790-93.
- Radhakrishnan, S., P. K. Ramaiah, and P. K. Bhat. 1987. Methodology to estimate yield loss in coffee due to insect pests . Journal of Coffee Research 17:90-93.