SHOLOPAK V, TRETIAK D. Mean-Variance Optimization: Modeling an Optimal Investment Portfolio in the U.S. Tech Sector. Sci. innov. [Internet]. 2025 Apr. 12 [cited 2025 Oct. 3];21(2):101-14. Available from: https://scinn-eng.org.ua/ojs/index.php/ni/article/view/773