LEWIN, P. A.; NOWICKI, A. Acoustic output levels and ultrasound output display standard. Archives of Acoustics, [S. l.], v. 23, n. 2, p. 267–280, 1998. Disponível em: https://acoustics.ippt.gov.pl/index.php/aa/article/view/911. Acesso em: 4 mar. 2026.