PHAM , H. T. An inclined stepped plate transducer for ultrasonic applications. Journal of Technical Education Science, [S. l.], v. 11, n. 2, p. 88–96, 2016. Disponível em: https://www.jte.edu.vn/index.php/jte/article/view/447. Acesso em: 7 apr. 2026.