Herrera, I.
(2023).
 Unified theory of Trefftz methods and numerical implications.
<em>Computer Assisted Methods In Engineering And Science, 10</em>(4), 495- 514.
Retrieved from <a href="https://cames.ippt.pan.pl/index.php/cames/article/view/1060" target="_new">https://cames.ippt.pan.pl/index.php/cames/article/view/1060</a>