Murcinkova, Zuzana, Vladimir Kompis, and Mario Stiavnicky. “Trefftz Functions for 3D Stress Concentration Problems”. Computer Assisted Methods in Engineering and Science 15, no. 3-4 (July 20, 2022): 305–318. Accessed January 12, 2025. https://cames3.ippt.pan.pl/index.php/cames/article/view/738.