1. Protection against radon-222 at home and work,1993
2. Sources, Effects and Risk of Ionizing Radiation;UNSCEAR,1993
3. Calibration of LR-115 plastic track detectors for environmental radon measurements;Ramola;Ind. Built Environ.,1996
4. T.V. Ramachandran, Proceedings of the 11th National Symposium on SSNTDs, Amritsar, India, 1998, pp. 50–68.