S. Czarnecki and T. Lewiński, “Shaping the stiffest three-dimensional structures from two given isotropic materials”, CAMES, vol. 13, no. 1, pp. 53–83, Nov. 2022, Accessed: Jan. 12, 2025. [Online]. Available: https://cames3.ippt.pan.pl/index.php/cames/article/view/964