Leitão, Vitor M.A. “Comparison of Galerkin and Collocation Trefftz Formulations for Plane Elasticity”. Computer Assisted Methods in Engineering and Science 8, no. 2-3 (March 2, 2023): 397–407. Accessed January 12, 2025. https://cames3.ippt.pan.pl/index.php/cames/article/view/1178.