SNAKOWSKA, A.; IDCZAK, H. The saddle point method applied to selected problems of acoustics. Archives of Acoustics, [S. l.], v. 31, n. 1, p. 57–76, 2014. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/657. Acesso em: 25 apr. 2025.