CIESZKO, M. “Acoustical Properties of Porous Layer – Undeformable Halfspace System at Normal Incidence of Harmonic Wave”. Archives of Acoustics 17, no. 2 (June 30, 1992): 261–276. Accessed April 9, 2026. https://acoustics.ippt.pan.pl/index.php/aa/article/view/1187.