Шаждекеева, Н.К., and А.О. Чанпалова. “SOLUTION OF THE DUAL PROBLEM BY THE BARANKIN-DORFMAN METHOD FOR THE FORMATION OF THE INVESTMENT PORTFOLIO”. Bulletin of Abai KazNPU. Series of Physical and mathematical sciences 70, no. 2 (June 30, 2020): 130–134. Accessed November 24, 2024. https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/45.