@article{silveira_1991,  title={A indeterminação de Senior },  volume={11},  ISSN={0101-3157},  url={https://doi.org/10.1590/0101-31571991-0902},  DOI={10.1590/0101-31571991-0902},  number={4},  journal={Brazilian Journal of Political Economy},  publisher={Centro de Economia Política},  author={SILVEIRA, ANTONIO MARIA DA},  year={1991},  month={Oct},  pages={545–564} }