Tiwari, S.K., Satyanarayana, B., Pai, A.G. and Trivedi, K.K. 2009. Circular Capacitance Micromachined Ultrasonic Transducer. Defence Science Journal. 59, 6 (Nov. 2009), 627-633. DOI:https://doi.org/10.14429/dsj.59.1568.