@article{valenzuela_1991,  title={A opção parlamentarista para a América Latina},  ISSN={0102-6445},  url={https://doi.org/10.1590/S0102-64451991000200004},  DOI={10.1590/S0102-64451991000200004},  number={24},  journal={Lua Nova: Revista de Cultura e Política},  publisher={CEDEC},  author={Valenzuela, Arturo},  year={1991},  month={Sep},  pages={55–71} }