A. Blinowski, J. Ostrowska-Maciejewska, and J. Rychlewski, “Two-dimensional Hooke’s tensors - isotropic decomposition, effective symmetry criteria”, Arch. Mech., vol. 48, no. 2, pp. 325–345, Jan. 1996, Accessed: Jan. 17, 2026. [Online]. Available: http://am.ippt.gov.pl/index.php/am/article/view/v48p325