NGUYEN, N. P.; NGUYEN, X. Q. A study on the impact of distance between tranducer and objects affecting efficiency of ultrasonic cleaning machine. Journal of Technical Education Science, [S. l.], v. 6, n. 3, p. 69–73, 2011. Disponível em: https://www.jte.edu.vn/index.php/jte/article/view/777. Acesso em: 7 apr. 2026.