PIECHOWICZ, Janusz; CZAJKA, Ireneusz. Estimation of Acoustic Impedance for Surfaces Delimiting the Volume of an Enclosed Space. Archives of Acoustics, [S. l.], v. 37, n. 1, p. 97–102, 2013. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/132. Acesso em: 28 apr. 2025.