CZARNECKI, Sławomir; LEWIŃSKI, Tomasz. Shaping the stiffest three-dimensional structures from two given isotropic materials. Computer Assisted Methods in Engineering and Science, [S. l.], v. 13, n. 1, p. 53–83, 2006. Disponível em: https://cames.ippt.gov.pl/index.php/cames/article/view/964. Acesso em: 5 mar. 2026.