Шаждекеева Н, Чанпалова А. SOLUTION OF THE DUAL PROBLEM BY THE BARANKIN-DORFMAN METHOD FOR THE FORMATION OF THE INVESTMENT PORTFOLIO. Phys-Math [Internet]. 2020Jun.30 [cited 2024Nov.22];70(2):130-4. Available from: https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/45