HERRERA, Ismael. Unified theory of Trefftz methods and numerical implications. Computer Assisted Methods in Engineering and Science, [S. l.], v. 10, n. 4, p. 495–514, 2023. Disponível em: https://cames3.ippt.pan.pl/index.php/cames/article/view/1060. Acesso em: 12 jan. 2025.