BEDNÁRIK, Martin; KOHÚT, Igor. Out-of-plane principal stress in plane strain/stress failure investigations – an overview of its relevance for various failure criteria. Contributions to Geophysics and Geodesy, [S. l.], v. 36, n. 4, p. 343–359, 2021. Disponível em: https://journals.savba.sk/index.php/cgg/article/view/5027. Acesso em: 4 feb. 2026.