SZEPTYŃSKI, P. Yield Criterion Accounting for the Influence of the Third Invariant of Stress Tensor Deviator. Part II. Analysis of Convexity Condition of the Yield Surface. Engineering Transactions, [S. l.], v. 59, n. 4, p. 283–297, 2014. DOI: 10.24423/engtrans.139.2011. Disponível em: https://et3.ippt.pan.pl/index.php/et/article/view/139. Acesso em: 9 jun. 2025.