KOWALCZYK-GAJEWSKA, Katarzyna, and Janina OSTROWSKA-MACIEJEWSKA. “Review on Spectral Decomposition of Hooke’s Tensor for All Symmetry Groups of Linear Elastic Material”. Engineering Transactions 57, no. 3-4 (September 7, 2014): 145–183. Accessed July 15, 2025. https://et.ippt.pan.pl/index.php/et/article/view/172.