Bhatnagar, P. K., A. Nagaratnam, G. Subrahmanian, and S. V. Raghavan. “Current Status of Radioisotope Applications in Defence”. Defence Science Journal 37, no. 3 (January 16, 2014): 339–346. Accessed June 16, 2025. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/5921.