PODLIPENKO, Yu. K. Potential theory for problems of diffraction on a layer between two parallel planes. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 5, p. 647–662, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5852. Acesso em: 5 dec. 2025.