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, jan. 2023. ISSN 2956-5839. Available at: <https://cames.ippt.pan.pl/index.php/cames/article/view/1060>. Date accessed: 23 dec. 2024.