PIDDUBNIAK, O. Total scattering cross-section of a nondeformable sphere partially insonified at a circular annular spot. Archives of Acoustics, [S. l.], v. 22, n. 3, p. 297–306, 2014. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/956. Acesso em: 28 apr. 2025.