DANICKI, Eugeniusz J. Efficiency of Ultrasonic Comb Transducers. Archives of Acoustics, [S. l.], v. 36, n. 4, p. 887–900, 2013. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/151. Acesso em: 13 may. 2025.