@article{paula_pimentel_1989,  title={A lei do valor e a crise do nosso tempo},  volume={9},  ISSN={0101-3157},  url={https://doi.org/10.1590/0101-31571989-1366},  DOI={10.1590/0101-31571989-1366},  number={2},  journal={Brazilian Journal of Political Economy},  publisher={Centro de Economia Política},  author={PAULA, JOÃO ANTONIO DE and PIMENTEL, FERNANDO DAMATA},  year={1989},  month={Apr},  pages={209–221} }