CEMPEL, Czesław; KOSIEL, Urszula. Noise sources identification in machines and mechanical devices. Archives of Acoustics, [S. l.], v. 1, n. 1, p. 5–19, 1976. Disponível em: https://acoustics.ippt.pan.pl/index.php/aa/article/view/3498. Acesso em: 1 may. 2026.