@article{ferreira_almeida filho_souza_2009,  title={A decision model for portfolio selection},  volume={29},  ISSN={0101-7438},  url={https://doi.org/10.1590/S0101-74382009000200008},  DOI={10.1590/S0101-74382009000200008},  number={2},  journal={Pesquisa Operacional},  publisher={Sociedade Brasileira de Pesquisa Operacional},  author={Ferreira, Rodrigo José Pires and Almeida Filho, Adiel Teixeira de and Souza, Fernando Menezes Campello de},  year={2009},  month={May},  pages={403–417} }