RYFFERT, H. XXVIII Open Seminar on Acoustics Gliwice, 7–11 September, 1981. Archives of Acoustics, [S. l.], v. 7, n. 3-4, p. 287–292, 2016. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3289. Acesso em: 26 apr. 2025.