FILIPCZYŃSKI, Leszek, and Tamara KUJAWSKA. “Acoustical Shadow of a Sphere Immersed in Water. II”. Archives of Acoustics 14, no. 3-4 (July 10, 2015): 181–190. Accessed April 26, 2025. https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3047.