BOLSHAKOVA, Irina V. Fuzzy returns in portfolio theory (method of triangular fuzzy numbers). Journal of the Belarusian State University. Economics, [S. l.], n. 2, p. 50–59, 2021. Disponível em: https://journals.bsu.by/index.php/economy/article/view/3258. Acesso em: 18 jul. 2026.