DORGAN, R.J.; VOYIADJIS, G.Z. Functional forms of hardening internal state variables in modeling elasto-plastic behavior. Archives of Mechanics, Warsaw, Poland, v. 59, n. 1, p. 35–58, 2007. Disponível em: http://am.ippt.gov.pl/index.php/am/article/view/v59p35. Acesso em: 17 jan. 2026.