TIWARI, S. K.; SATYANARAYANA, B.; PAI, A. G.; TRIVEDI, K. K. Circular Capacitance Micromachined Ultrasonic Transducer. Defence Science Journal, [S. l.], v. 59, n. 6, p. 627–633, 2009. DOI: 10.14429/dsj.59.1568. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/1568. Acesso em: 17 aug. 2025.