Jasim DK, Al-Qaisi SJ, Ibrahim WA. Mixed Triple Optimal Control Vector Problem for Nonlinear Triple Elliptic System. Iraqi Journal of Science [Internet]. 2025 Aug. 30 [cited 2026 May 15];66(8):3367-74. Available from: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/13147