J. Jirousek, A. Wróblewski, and B. Szybiński, “Alternative displacement frame formulations in hybrid-Trefftz Kirchhoff plate p-elements”, Comp. Assist. Methods Eng. Sci., vol. 4, no. 3-4, pp. 417–451, Jun. 2023, Accessed: Jun. 30, 2025. [Online]. Available: https://cames.ippt.pan.pl/index.php/cames/article/view/1382