L. Y. Kou, W. Y. Zhao, X. Y. Tuo, G. Wang, and C. R. Sun, “Effect of stress triaxiality on fracture failure of 6061 aluminium alloy”, J. Mech. Eng. Sci., vol. 14, no. 2, pp. 6961–6970, Jun. 2020, doi: 10.15282/jmes.14.2.2020.33.0545.