A. Klimasek, A. Pilski, and J. Zabawa, “The Bending Vibrations of an Anisotropic Free Circular Plate of Regular Symmetry”, Eng. Trans., vol. 31, no. 1, pp. 77–84, Mar. 1983, Accessed: Jun. 12, 2025. [Online]. Available: https://et3.ippt.pan.pl/index.php/et/article/view/1926