CHIRAG SHAH. Portfolio Optimization Using Short Look Back Period Volatility: An Application of Modern Portfolio Theory. European Economic Letters (EEL), [S. l.], v. 15, n. 2, p. 4625–4629, 2025. Disponível em: https://eelet.org.uk/index.php/journal/article/view/3311. Acesso em: 26 jul. 2026.