KIEŁCZYŃSKI, P. Finite element method (FEM) and impulse response method (IRM) analysis of circular ultrasonic transducers. Archives of Acoustics, [S. l.], v. 23, n. 2, p. 291–306, 1998. Disponível em: http://acoustics.ippt.gov.pl/index.php/aa/article/view/913. Acesso em: 18 apr. 2026.