BLY, S.; HUSSEY, R.; BENWELL, D. Output levels from medical diagnostic ultrasound devices sold in Canada. Canadian Acoustics, [S. l.], v. 14, n. 4, p. 11–18, 1986. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/567. Acesso em: 4 dec. 2021.