A. Uściłowska-Gajda, J. . A. Kołodziej, M. Ciałkowski, and A. Frąckowiak, “Comparison of two types of Trefftz method for the solution of inhomogeneous elliptic problems”, CAMES, vol. 10, no. 4, pp. 661–675, Jan. 2023, Accessed: Jan. 26, 2025. [Online]. Available: https://cames3.ippt.pan.pl/index.php/cames/article/view/1073