W. RDZANEK, “Directional characteristic of a circular membrane vibrating under the effect of a force with uniform surface distribution”, Arch. Acoust., vol. 10, no. 2, pp. 179–190, Jul. 2015, Accessed: Jan. 17, 2026. [Online]. Available: https://acoustics.ippt.gov.pl/index.php/aa/article/view/3143