B. Szybiński, A. Wróblewski, and A. P. Zieliński, “General strategy of h-p adaptive solutions in structural Trefftz-type element analysis”, Comp. Assist. Methods Eng. Sci., vol. 8, no. 2-3, pp. 469–477, Mar. 2023, Accessed: Jul. 02, 2025. [Online]. Available: https://cames.ippt.pan.pl/index.php/cames/article/view/1189