Subash Chandrabose , M.R., and N. Biju. “Design of a Low Frequency, Wideband Tonpilz Transducer for Sonar Applications”. Advances in Military Technology 20, no. 1 (April 17, 2025): 95–105. Accessed July 26, 2025. https://www.aimt.cz/index.php/aimt/article/view/1971.