FILIPCZYŃSKI, Leszek, and Tamara KUJAWSKA. “Acoustical Shadow of a Sphere Immersed in Water. II”. Archives of Acoustics 14, no. 3-4 (December 31, 1989): 181–190. Accessed March 4, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/3047.