HERRERA, Ismael.
 Unified theory of Trefftz methods and numerical implications.
<strong>Computer Assisted Methods in Engineering and Science</strong>, [S.l.], v. 10, n. 4, p. 495- 514, jan. 2023.
ISSN 2956-5839.
Available at: &lt;<a href="https://cames.ippt.gov.pl/index.php/cames/article/view/1060" target="_new">https://cames.ippt.gov.pl/index.php/cames/article/view/1060</a>&gt;. Date accessed: 23 dec. 2024.