CIPIN, J. New noise insulation material: expanded polystyrene granules with heavy core. Canadian Acoustics, [S. l.], v. 25, n. 3, p. 11–11, 1997. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1082. Acesso em: 22 sep. 2024.