ENGEL, Zbigniew. Proceedings of the Conference on Noise Suppression NOISE CONTROL 85. Archives of Acoustics, [S. l.], v. 10, n. 4, p. 317–318, 2015. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3166. Acesso em: 25 apr. 2025.