BÖHLKE, T. The Voigt bound of the stress potential of isotropic viscoplastic FCC polycrystals. Archives of Mechanics, Warsaw, Poland, v. 56, n. 6, p. 425–445, 2004. Disponível em: https://am.ippt.pan.pl/index.php/am/article/view/v56p425. Acesso em: 19 nov. 2025.