Nguyen, H., T. Nguyen, T. Nguyen, and H. Vu. “Forming Limit Curve Determination of AA6061-T6 Aluminum Alloy Sheet”. Science and Technology Development Journal, Vol. 20, no. K2, June 2017, pp. 51-60, doi:https://doi.org/10.32508/stdj.v20iK2.448.