L. FILIPCZYŃSKI and T. KUJAWSKA, “Acoustical shadow of a sphere immersed in water. I”, Arch. Acoust., vol. 14, no. 1-2, pp. 29–43, Jul. 2015, Accessed: Jun. 10, 2025. [Online]. Available: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3035