Silva, Luiz da Penha Souza da, and Marcos Roberto Gois de Oliveira. 2011. “Regulation, Diversification and Investments Abroad – Impacts on the Efficiency of Investment Management by Brazilian Pension Funds in Light of Portfolio Theory”. Brazilian Business Review 8 (4):89-117. https://doi.org/10.15728/bbr.2011.8.4.5.