FREITAS, João A. Teixeira de. Time integration and the Trefftz Method Part II - Second-order and hyperbolic problems. Computer Assisted Methods in Engineering and Science, [S. l.], v. 10, n. 4, p. 465–477, 2023. Disponível em: https://cames3.ippt.pan.pl/index.php/cames/article/view/1058. Acesso em: 12 jan. 2025.