Marinho da Silva RF, Carmona CU, Lagioia UCT. Risk Relation and the Corporative Governance Practice in the Brazilian Stock Market: an approach according to the portfolio theory by Markowitz. Rev. Bras. Gest. Neg. [Internet]. 2011 Jul. 7 [cited 2024 Apr. 27];13(39):175-92. Available from: https://rbgn.fecap.br/RBGN/article/view/789