Vakrinienė, Sigutė, and Gintautas Misevičius. “Linear and Non-Linear Optimization Models for the Selection of Investment Portfolio”. Lietuvos matematikos rinkinys 47, no. spec. (June 15, 2021): 383–388. Accessed April 19, 2025. https://journals.vu.lt./LMR/article/view/24233.