@article{rangel_1990,  title={O Quarto Ciclo de Kondratiev},  volume={10},  ISSN={0101-3157},  url={https://doi.org/10.1590/0101-31571990-4030},  DOI={10.1590/0101-31571990-4030},  number={4},  journal={Brazilian Journal of Political Economy},  publisher={Centro de Economia Política},  author={RANGEL, IGNÁCIO M.},  year={1990},  month={Oct},  pages={489–502} }