Piltner, R.
(2023).
 On the systematic construction of trial functions for hybrid Trefftz shell elements.
<em>Computer Assisted Methods In Engineering And Science, 4</em>(3-4), 633-644.
Retrieved from <a href="https://cames.ippt.gov.pl/index.php/cames/article/view/1395" target="_new">https://cames.ippt.gov.pl/index.php/cames/article/view/1395</a>