Kiên, Bùi Trọng, Nguyễn Thị Toàn, Mu Ming Wong, and Jen Chih Yao. 2012. “LOWER SEMI-CONTINUITY OF THE SOLUTION SET TO A PARAMETRIC OPTIMAL CONTROL PROBLEM”. Dalat University Journal of Science 2 (3): 8-13. https://doi.org/10.37569/DalatUniversity.2.3.203(2012).