@article{crocco_2012,  title={Centralidade e hierarquia do sistema financeiro brasileiro},  volume={22},  ISSN={0103-6351},  url={https://doi.org/10.1590/S0103-63512012000100002},  DOI={10.1590/S0103-63512012000100002},  number={1},  journal={Nova Economia},  publisher={Nova Economia},  author={Crocco, Marco},  year={2012},  month={Jan},  pages={31–79} }