ZIENIUK, E.; SZERSZEŃ, K. A solution of 3D Helmholtz equation for boundary geometry modeled by Coons patches using the Parametric Integral Equation System. Archives of Acoustics, [S. l.], v. 31, n. 1, p. 99–111, 2014. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/660. Acesso em: 26 apr. 2025.