Bouberbachene, Mohamed, Christian Hochard, and Arnaud Poitou. “Domain Optimisation Using Trefftz Functions – Application to Free Boundaries”. Computer Assisted Methods in Engineering and Science 4, no. 3-4 (June 15, 2023): 317–326. Accessed April 19, 2025. https://cames3.ippt.pan.pl/index.php/cames/article/view/1375.