R. VIJAYAPRIYA, G. BALASUBRAMANIYAN. Risk–Return and Portfolio Optimization of Selected Energy Sectors in India. International Journal of Special Education, [S. l.], v. 41, n. 15s, p. 195–205, 2026. Disponível em: https://www.internationalsped.com/index.php/ijse/article/view/4771. Acesso em: 22 oct. 2026.