Sharma, Ramesh, Subodh Kumar, Saurabh Gupta, and Hari Srivastava. “Ultrasonic Standoff Photoacoustic Sensor for the Detection of Explosive and Hazardous Molecules”. Defence Science Journal 68, no. 4 (June 26, 2018): 401–405. Accessed July 6, 2025. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/12454.