MIGNERON, J.-G.; LEMIEUX, P. Development of a polar intensity measurement technique and potential uses. Canadian Acoustics, [S. l.], v. 19, n. 4, p. 59–60, 1991. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/670. Acesso em: 18 jan. 2022.