Lee, C., 		Qin, Q., & 		Wang, H.
(2022).
 Trefftz functions and application to 3D elasticity.
<em>Computer Assisted Methods In Engineering And Science, 15</em>(3-4), 251-263.
Retrieved from <a href="https://cames.ippt.pan.pl/index.php/cames/article/view/734" target="_new">https://cames.ippt.pan.pl/index.php/cames/article/view/734</a>