CZARNECKI, Sławomir, Tomasz LEWIŃSKI, and Paweł WAWRUCH. “On Shape and Material Optimization of Isotropic Bodies”. Engineering Transactions 65, no. 1 (March 20, 2017): 3–9. Accessed July 14, 2025. https://et.ippt.pan.pl/index.php/et/article/view/754.